FCC ID: C3K1889 Dual-band wireless accessory radio

1889 (Accessory Radio) Module Setup Diagram Dual-band wireless accessory radio Please prepare Windows 7 OS Notebook Step1. Insert Type B to PC USB & AdapterDevice Manager show Pictureand press Mouse Right Key updateWhen install finish Before After Setp2.Executexxx\\customer_package_UIv2.06_DLLv4.09_E2-20190402_WinDriverV.0. 0.2.5_FWv.42a1045_VIDPIDCorrected\ QATool_Dbg.exe for Start QA Tool

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If driver shows exclamation mark, follow the steps to update Step1.Check Hardware identification code Step2.Open the safety information Step3.Key in the Hardware identification code you got from step1

Federal Communication Commission Interference Statement This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

(1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. Operations in the 5.15-5.25GHz band are restricted to indoor usage only. Radiation Exposure Statement:

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator &

your body. This module is intended for OEM integrators only. Per FCC KDB 996369 D03 OEM Manual v01 guidance, the following conditions must be strictly followed when using this certified module:

KDB 996369 D03 OEM Manual v01 rule sections:

2.2 List of applicable FCC rules This module has been tested for compliance to FCC Part 15.247 & Part 15 Subpart E. 2.3 Summarize the specific operational use conditions The module is tested for standalone mobile RF exposure use condition. Any other usage conditions such as co-location with other transmitter(s) or being used in a portable condition will need a separate reassessment through a class II permissive change application or new certification. 2.4 Limited module procedures This module is limited to specific Microsoft Host, authenticated and operated by non-alterable secure program code contained and controlled by the Host as described in the application exhibit. 2.5 Trace antenna designs Not applicable. 2.6 RF exposure considerations 2.7 Antennas the antenna and users. This equipment complies with FCC mobile radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20cm between the radiator & your body. If the module is installed in a portable host, a separate SAR evaluation is required to confirm compliance with relevant FCC portable RF exposure rules. The following antennas have been certified for use with this module; antennas of the same type with equal or lower gain may also be used with this module. The antenna must be installed such that 20 cm can be maintained between 2.8 Label and compliance information The final end product must be labeled in a visible area with the following: Contains FCC ID:

C3K1889. The grantee's FCC ID can be used only when all FCC compliance requirements are met. 2.9 Information on test modes and additional testing requirements This transmitter is tested in a standalone mobile RF exposure condition and any co-located or simultaneous transmission with other transmitter(s) or portable use will require a separate class II permissive change re-evaluation or new certification. 2.10 Additional testing, Part 15 Subpart B disclaimer This transmitter module is tested as a subsystem and its certification does not cover the FCC Part 15 Subpart B (unintentional radiator) rule requirement applicable to the final host. The final host will still need to be reassessed for compliance to this portion of rule requirements if applicable. As long as all conditions above are met, further transmitter test will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed. IMPORTANT NOTE: In the event that these conditions can not be met (for example certain laptop configurations or co-location with another transmitter), then the FCC authorization is no longer considered valid and the FCC ID can not be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization. Manual Information To the End User The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the users manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual. OEM/Host manufacturer responsibilities OEM/Host manufacturers are ultimately responsible for the compliance of the Host and Module. The final product must be reassessed against all the essential requirements of the FCC rule such as FCC Part 15 Subpart B before it can be placed on the US market. This includes reassessing the transmitter module for compliance with the Radio and EMF essential requirements of the FCC rules. This module must not be incorporated into any other device or system without retesting for compliance as multi-radio and combined equipment Industry Canada statement:

This device complies with ISEDs licence-exempt RSSs. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Le prsent appareil est conforme aux CNR d ISED applicables aux appareils radio exempts de licence. Lexploitation est autorise aux deux conditions suivantes : (1) le dispositif ne doit pas produire de brouillage prjudiciable, et (2) ce dispositif doit accepter tout brouillage reu, y compris un brouillage susceptible de provoquer un fonctionnement indsirable. Radiation Exposure Statement:

This equipment complies with ISED radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with greater than 20cm between the radiator & your body. and Dclaration d'exposition aux radiations:

Cet quipement est conforme aux limites d'exposition aux rayonnements ISED tablies pour un environnement non contrl. Cet quipement doit tre install et utilis plus de 20 cm entre le radiateur et votre corps. This device is intended only for OEM integrators under the following conditions: (For module device use) 1) The antenna must be installed and operated with greater than 20cm between the antenna and users, 2) The transmitter module may not be co-located with any other transmitter or antenna. As long as 2 conditions above are met, further transmitter test will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed. Cet appareil est conu uniquement pour les intgrateurs OEM dans les conditions suivantes: (Pour utilisation de dispositif module) 1) L'antenne doit tre install et exploit avec plus de 20 cm entre l'antenne et les utilisateurs, et 2) Le module metteur peut ne pas tre complant avec un autre metteur ou antenne. Tant que les 2 conditions ci-dessus sont remplies, des essais supplmentaires sur l'metteur ne seront pas ncessaires. Toutefois, l'intgrateur OEM est toujours responsable des essais sur son produit final pour toutes exigences de conformit supplmentaires requis pour ce module install. IMPORTANT NOTE:

In the event that these conditions can not be met (for example certain laptop configurations or co-location with another transmitter), then the Canada authorization is no longer considered valid and the IC ID can not be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate Canada authorization. NOTE IMPORTANTE:

Dans le cas o ces conditions ne peuvent tre satisfaites (par exemple pour certaines configurations d'ordinateur portable ou de certaines co-localisation avec un autre metteur), l'autorisation du Canada n'est plus considr comme valide et l'ID IC ne peut pas tre utilis sur le produit final. Dans ces circonstances, l'intgrateur OEM sera charg de rvaluer le produit final (y compris l'metteur) et l'obtention d'une autorisation distincte au Canada. End Product Labeling This transmitter module is authorized only for use in device where the antenna may be installed and operated with greater than 20cm between the antenna and users. The final end product must be labeled in a visible area with the following: Contains IC: 3048A-1889. Plaque signaltique du produit final Ce module metteur est autoris uniquement pour une utilisation dans un appareil o lantenne peut tre installe et utilise plus de 20 cm entre lantenne et les utilisateurs. Le produit final doit tre tiquet dans un endroit visible avec l'inscription suivante: "Contient des IC: 3048A-1889". Manual Information To the End User The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the users manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual. Manuel d'information l'utilisateur final L'intgrateur OEM doit tre conscient de ne pas fournir des informations l'utilisateur final quant la faon d'installer ou de supprimer ce module RF dans le manuel de l'utilisateur du produit final qui Le manuel de l'utilisateur final doit inclure toutes les informations rglementaires requises et avertissements comme indiqu dans ce manuel. intgre ce module. Caution :

(i) the device for operation in the band 5150-5250 MHz is only for indoor use to reduce the potential for harmful interference to co-channel mobile satellite systems;

(ii) for devices with detachable antenna(s), the maximum antenna gain permitted for devices in the band 5725-5850 MHz shall be such that the equipment still complies with the e.i.r.p. limits as appropriate;

(iii) where applicable, antenna type(s), antenna models(s), and worst-case tilt angle(s) necessary to remain compliant with the e.i.r.p. elevation mask requirement set forth in section 6.2.2.3 shall be clearly indicated. Avertissement:

(i) les dispositifs fonctionnant dans la bande 5150-5250 MHz sont rservs uniquement pour une utilisation lintrieur afin de rduire les risques de brouillage prjudiciable aux systmes de satellites mobiles utilisant les mmes canaux;

(ii) pour les dispositifs munis dantennes amovibles, le gain maximal dantenne permis (pour les dispositifs utilisant la bande de 5 725 5 850 MHz) doit tre conforme la limite de la p.i.r.e. spcifie, selon le cas;

(iii) lorsquil y a lieu, les types dantennes (sil y en a plusieurs), les numros de modle de lantenne et les pires angles dinclinaison ncessaires pour rester conforme lexigence de la p.i.r.e. applicable au masque dlvation, nonce la section 6.2.2.3, doivent tre clairement indiqus. NCC 1. 2. 3. 4. CCXXXXYYyyyZzW

1889 (Accessory Radio) Module Setup Diagram Dual-band wireless accessory radio Please prepare Windows 7 OS Notebook Step1. Insert Type B to PC USB & AdapterDevice Manager show Pictureand press Mouse Right Key updateWhen install finish Before After Setp2.Executexxx\\customer_package_UIv2.06_DLLv4.09_E2-20190402_WinDriverV.0. 0.2.5_FWv.42a1045_VIDPIDCorrected\ QATool_Dbg.exe for Start QA Tool

==================backup======================

If driver shows exclamation mark, follow the steps to update Step1.Check Hardware identification code Step2.Open the safety information Step3.Key in the Hardware identification code you got from step1 Federal Communication Commission Interference Statement This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

(1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. Operations in the 5.15-5.25GHz band are restricted to indoor usage only. Radiation Exposure Statement:

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator &

your body. This module is intended for OEM integrators only. Per FCC KDB 996369 D03 OEM Manual v01 guidance, the following conditions must be strictly followed when using this certified module:

KDB 996369 D03 OEM Manual v01 rule sections:

2.2 List of applicable FCC rules This module has been tested for compliance to FCC Part 15.247 & Part 15 Subpart E. 2.3 Summarize the specific operational use conditions The module is tested for standalone mobile RF exposure use condition. Any other usage conditions such as co-location with other transmitter(s) or being used in a portable condition will need a separate reassessment through a class II permissive change application or new certification. 2.4 Limited module procedures This module is limited to specific Microsoft Host, authenticated and operated by non-alterable secure program code contained and controlled by the Host as described in the application exhibit. 2.5 Trace antenna designs Not applicable. 2.6 RF exposure considerations This equipment complies with FCC mobile radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20cm between the radiator & your body. If the module is installed in a portable host, a separate SAR evaluation is required to confirm compliance with relevant FCC portable RF exposure rules. 2.7 Antennas The following antennas have been certified for use with this module; antennas of the same type with equal or lower gain may also be used with this module. The antenna must be installed such that 20 cm can be maintained between the antenna and users. 2.8 Label and compliance information The final end product must be labeled in a visible area with the following: Contains FCC ID:

C3K1889. The grantee's FCC ID can be used only when all FCC compliance requirements are met. 2.9 Information on test modes and additional testing requirements This transmitter is tested in a standalone mobile RF exposure condition and any co-located or simultaneous transmission with other transmitter(s) or portable use will require a separate class II permissive change re-evaluation or new certification. 2.10 Additional testing, Part 15 Subpart B disclaimer This transmitter module is tested as a subsystem and its certification does not cover the FCC Part 15 Subpart B (unintentional radiator) rule requirement applicable to the final host. The final host will still need to be reassessed for compliance to this portion of rule requirements if applicable. As long as all conditions above are met, further transmitter test will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed. IMPORTANT NOTE: In the event that these conditions can not be met (for example certain laptop configurations or co-location with another transmitter), then the FCC authorization is no longer considered valid and the FCC ID can not be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization. Manual Information To the End User The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the users manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual. OEM/Host manufacturer responsibilities OEM/Host manufacturers are ultimately responsible for the compliance of the Host and Module. The final product must be reassessed against all the essential requirements of the FCC rule such as FCC Part 15 Subpart B before it can be placed on the US market. This includes reassessing the transmitter module for compliance with the Radio and EMF essential requirements of the FCC rules. This module must not be incorporated into any other device or system without retesting for compliance as multi-radio and combined equipment body. and Industry Canada statement:

This device complies with ISEDs licence-exempt RSSs. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Le prsent appareil est conforme aux CNR d ISED applicables aux appareils radio exempts de licence. Lexploitation est autorise aux deux conditions suivantes : (1) le dispositif ne doit pas produire de brouillage prjudiciable, et (2) ce dispositif doit accepter tout brouillage reu, y compris un brouillage susceptible de provoquer un fonctionnement indsirable. Radiation Exposure Statement:

This equipment complies with ISED radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with greater than 20cm between the radiator & your Dclaration d'exposition aux radiations:

Cet quipement est conforme aux limites d'exposition aux rayonnements ISED tablies pour un environnement non contrl. Cet quipement doit tre install et utilis plus de 20 cm entre le radiateur et votre corps. This device is intended only for OEM integrators under the following conditions: (For module device use) 1) The antenna must be installed and operated with greater than 20cm between the antenna and users, 2) The transmitter module may not be co-located with any other transmitter or antenna. As long as 2 conditions above are met, further transmitter test will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed. Cet appareil est conu uniquement pour les intgrateurs OEM dans les conditions suivantes: (Pour utilisation de dispositif module) 1) L'antenne doit tre install et exploit avec plus de 20 cm entre l'antenne et les utilisateurs, et 2) Le module metteur peut ne pas tre complant avec un autre metteur ou antenne. Tant que les 2 conditions ci-dessus sont remplies, des essais supplmentaires sur l'metteur ne seront pas ncessaires. Toutefois, l'intgrateur OEM est toujours responsable des essais sur son produit final pour toutes exigences de conformit supplmentaires requis pour ce module install. IMPORTANT NOTE:

In the event that these conditions can not be met (for example certain laptop configurations or co-location with another transmitter), then the Canada authorization is no longer considered valid and the IC ID can not be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate Canada authorization. NOTE IMPORTANTE:

Dans le cas o ces conditions ne peuvent tre satisfaites (par exemple pour certaines configurations d'ordinateur portable ou de certaines co-localisation avec un autre metteur), l'autorisation du Canada n'est plus considr comme valide et l'ID IC ne peut pas tre utilis sur le produit final. Dans ces circonstances, l'intgrateur OEM sera charg de rvaluer le produit final (y compris l'metteur) et l'obtention d'une autorisation distincte au Canada. End Product Labeling This transmitter module is authorized only for use in device where the antenna may be installed and operated with greater than 20cm between the antenna and users. The final end product must be labeled in a visible area with the following: Contains IC: 3048A-1889. Plaque signaltique du produit final Ce module metteur est autoris uniquement pour une utilisation dans un appareil o lantenne peut tre installe et utilise plus de 20 cm entre lantenne et les utilisateurs. Le produit final doit tre tiquet dans un endroit visible avec l'inscription suivante: "Contient des IC: 3048A-1889". Manual Information To the End User The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the users manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual. Manuel d'information l'utilisateur final L'intgrateur OEM doit tre conscient de ne pas fournir des informations l'utilisateur final quant la faon d'installer ou de supprimer ce module RF dans le manuel de l'utilisateur du produit final qui intgre ce module. Le manuel de l'utilisateur final doit inclure toutes les informations rglementaires requises et avertissements comme indiqu dans ce manuel. Caution :

Avertissement:

(i) the device for operation in the band 5150-5250 MHz is only for indoor use to reduce the potential for harmful interference to co-channel mobile satellite systems;

(ii) for devices with detachable antenna(s), the maximum antenna gain permitted for devices in the band 5725-5850 MHz shall be such that the equipment still complies with the e.i.r.p. limits as appropriate;

(iii) where applicable, antenna type(s), antenna models(s), and worst-case tilt angle(s) necessary to remain compliant with the e.i.r.p. elevation mask requirement set forth in section 6.2.2.3 shall be clearly indicated.

(i) les dispositifs fonctionnant dans la bande 5150-5250 MHz sont rservs uniquement pour une utilisation lintrieur afin de rduire les risques de brouillage prjudiciable aux systmes de satellites mobiles utilisant les mmes canaux;

(ii) pour les dispositifs munis dantennes amovibles, le gain maximal dantenne permis (pour les dispositifs utilisant la bande de 5 725 5 850 MHz) doit tre conforme la limite de la p.i.r.e. spcifie, selon le cas;

(iii) lorsquil y a lieu, les types dantennes (sil y en a plusieurs), les numros de modle de lantenne et les pires angles dinclinaison ncessaires pour rester conforme lexigence de la p.i.r.e. applicable au masque dlvation, nonce la section 6.2.2.3, doivent tre clairement indiqus. NCC 1. 2. 3. 4. CCXXXXYYyyyZzW

Date: 2020-10-27 FCC ID: C3K1889 A U T H O R I Z A T I O N L E T T E R To Whom It May Concern:

Microsoft Corporation hereby authorizes Debby Lin / Senior Specialist of Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch (BV CPS Taoyuan), to act on its behalf in all matters relating to the Federal Communication Commission (FCC) application for equipment authorization in connection with the FCC ID listed above, including signing of all documents relating to these matters. Any and all acts carried out by Debby Lin/ Senior Specialistof BV CPS Taoyuan on Microsoft Corporation behalf, within the scope of the powers granted herein, shall have the same effect as acts of its own. If you have any questions regarding the authorization, please dont hesitate to contact us. Sincerely yours,

Chaitrali Limaye Compliance Engineer, Microsoft Corporation

Request for Confidentiality Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 Date: 2020-11-12 Subject:

FCC ID: C3K1889 To Whom It May Concern:

Pursuant to the provisions of Sections 0.457 and 0.459 of the Commissions rules (47 CFR 0.457, 0.459), we are requesting the Commission to withhold the following attachments as confidential document from public disclosure indefinitely. Schematics Operational Description (includes SW security) Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. In additional to above mentioned documents, pursuant to Public Notice DA 04-1705 of the Commissions policy, in order to comply with the marketing regulations in 47 CFR 2.803 and the importation rules in 47 CFR 2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices. We are requesting the commission to grant short-term confidentiality request on the following attachments until December 23rd, 2020. External Photos Test Setup Photos Users Manual Internal Photos It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Best Regards Sincerely yours,

Kyle Chen / Compliance Engineer Microsoft Corporation E-mail: yulchen@microsoft.com

Subject: Authorized signatories February 26, 2019 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, Maryland 21046 A G E N C Y A U T H O R I Z A T I O N L E T T E R F O R M I C R O S O F T E M P L O Y E E S To whom it may concern, I, the undersigned hereby authorize the following, to act on my behalf, as the agent(s), in all matters relating to all processes for FCC equipment authorization for Microsoft Corporation (Grantee Code:

C3K). Hasnain Syed Anindita Mitra David Johnson Michael Boucher Kyle Chen Chaitrali Limaye Wei Sun Zachary Gray Daniel Salinas Vishwas Varadanahalli Narayan Albert Huang Mengni Yin Choon Sian Ooi Nisha Nandakumar If you have any questions regarding the authorization, please dont hesitate to contact me. Sincerely, Hasnain Syed Sr. Director, EMC/SI & RF Compliance Microsoft Corporation Email: Hasnain.Syed@microsoft.com Microsoft Corporation is an equal opportunity employer.

Description of Permissive Change Date:11/6/2020 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Attn: OET Dept. Ref: Class II permissive change Applicant: Microsoft Corporation Dear Examiner, This is to request a Class II permissive change for FCC ID: C3K1889 This Equipment is prepared for FCC Class II change, the difference compared as the following:

Modifying antennas matching circuit and updating antenna gain as follows:

If you have any questions regarding this application, please feel free to contact me. Sincerely yours,

Kyle Chen / Compliance Engineer Microsoft Corporation E-mail: yulchen@microsoft.com

Date: 6/18/2020 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 FCC ID: C3K1889; IC: 3048A-1889 To whom it may concern:

I, the undersigned, hereby authorize Debby Lin/ Senior Specialist of Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch (BV CPS Taoyuan) and hereafter referred to as Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch (BV CPS Taoyuan) to act on our behalf in all manners relating to application for equipment authorization, including signing of all documents relating to these matters. Any and all acts carried out by Debby Lin/ Senior Specialist of Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch

(BV CPS Taoyuan) on our behalf shall have the same effect as acts of our own. I, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). In authorizing Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch (BV CPS Taoyuan) as our agent, we still recognize that we are responsible to:

Comply with the relevant provisions of the certification program;

a) b) c) d) make all necessary arrangements for the conduct of the evaluation, including provision for examining documentation and access to all areas, records (including internal audit reports) and personnel for the purposes of evaluation (e.g. testing, inspection, assessment, surveillance, reassessment) and resolution of complaints;

Make claims regarding certification only in respect of the scope for which certification has been granted;

Do not use our product certification in such a manner as to bring the Certification Division into disrepute and not make any statement regarding our product certification which the Certification Division may consider misleading or unauthorized;

e) f) g) h) i) j) Upon suspension or cancellation of certification, discontinue use of all advertising matter that contains any reference thereto and return any certification documents as required by the Certification Division;

Use certification only to indicate the products are certified as being in conformity with specified standards;

Endeavor to ensure that no certificate or report nor any part thereof is used in a misleading manner;

ensure that any reference to our product certification in communication media such as documents, brochures or advertising, complies with the requirements of the Certification Division;

keep a record of all complaints made known to the us relating to the products compliance with requirements of the relevant standard and to make these records available to the Certification Division when requested;

take appropriate action with respect to such complaints and any deficiencies found in products or services that affect compliance with the requirements for certification;

k) Document the actions taken. This authorization is valid until further written notice from the applicant. Sincerely,

Chaitrali Limaye Compliance Engineer, Microsoft Corporation

Date: June 10, 2020 We, Microsoft Corporation declare that the device does not support channel 12 ~ 13 in 2.4GHz band and any non-US channels in all the operational mode(s) for the following product. FCC ID: C3K1889 If you should have any question(s) regarding this declaration, please dont hesitate to contact us. Thank you!

Sincerely, Chaitrali Limaye Compliance Engineer Microsoft Corporation

6/29/2020 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 Subject: Request for Confidentiality for FCC ID: C3K1889 To Whom It May Concern:

Pursuant to the provisions of the Commissions rules 47 CFR sections 0.457(d) and 0.459, we are requesting the Commission to withhold the following attachments as confidential document from public disclosure indefinitely. Block Diagram Schematics Operational Description (includes SW security) The above-mentioned documents contain detailed system and equipment descriptions that are considered as proprietary information in the operation of the equipment. Public disclosure of the above documents might be harmful to our company and would give competitors an unfair advantage in the market. In additional to above mentioned documents, pursuant to Public Notice DA 04-1705 of the Commissions policy, to comply with the marketing regulations in 47 CFR 2.803 and the importation rules in 47 CFR 2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we are requesting the commission to grant short-term confidentiality on the following attachments until December 23rd, 2020. Microsoft Corporation is an equal opportunity employer. It is our understanding that all measurement test reports, FCC ID label format and correspondence during certification review process cannot be granted as confidential documents and the information will be available for public review once the grant of equipment authorization is issued. External Photos Test Setup Photos Users Manual Internal Photos Sincerely, Chaitrali Limaye Compliance Engineer, Microsoft Corporation. Microsoft Corporation is an equal opportunity employer.

FCC ID: C3K1889 Modular Approval Request Letter July 8, 2020 Dear Application Examiner, The requirements of KDB996369 have been met and shown on the following statements. 1. The modular transmitter must have its own RF shielding. The radio portion of this module has been shielded, please see exhibition External Photo. 2. The modular transmitter must have buffered modulation/data inputs. The EUT has buffered data inputs to ensure compliance with Part 15 requirements under conditions of excessive data rates or over-modulation. Please see the Schematics exhibit submitted in this application. 3. The modular transmitter must have its own power supply regulation. The EUT has its own power supply regulation to ensure compliance with Part 15 requirements regardless of the quality or level of external DC supplying the module from the host unit. The technical report exhibit submitted in this application contains AC power line conducted emissions data taken with the EUT powered from a linear power supply that contains no EMC suppression components. 4. The modular transmitter must comply with the antenna requirements of section 15.203 and 15.204(C). The EUT meets the FCC antenna requirements. The spurious emission, unique antenna connector and photo of antennas are shown in the test report. 5. The modular transmitter must be tested in a stand-alone configuration. This module is limited to specific Microsoft Host, authenticated and operated by non-alterable secure program code contained and controlled by the Host as described in the application exhibit. 6. The modular transmitter must be labeled with its own FCC ID number. Please see exhibition Label Sample for the FCC ID of this module. And also in the exhibition Users Manual, there are instructions give to the OEM on how to label the end product. M i c r o s o f t C o r p o r a t i o n

, 1 8 8 9

, F C C I D

C 3 K 1 8 8 9 w o u l d l i k e t o h a v e y o u r a u t h o r i z a t i o n a s a l i m i t e d m o d u l a r a p p r o v a l s p e c i f i c t o t h e m o b i l e R F e x p o s u r e c o n d i t i o n

. FCC ID: C3K1889 7. The modular transmitter must comply with any specific rule or operating requirements applicable to the transmitter and the manufacturer must provide adequate instructions along with the module to explain any such requirements. The EUT is compliant with all applicable FCC rules. Detail instructions for maintaining compliance are given in the Users Manual. 8. The modular transmitter must comply with any applicable RF exposure requirements. The EUT is compliant with all applicable RF exposure requirements. RF Exposure is addressed in the RF exposure exhibition. Please contact me if you have any further questions. Thanks for your attention. Best Regards, Debby Lin Senior Specialist Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch