FCC ID: YZZGUV3050V20 Wireless Bluetooth Headset

Headset Components Wear the GUV3050 Headset Charge the battery Adjustable headband Volume up Power on/Power Busylight indicator Multi - function button Volume down Bluetooth indicator Microphone boom-arm switch USB charging port Base Charging Point Package contents GUV3050 BT headset can be worn only on the right. Adjust the Headband Place the headset receiver to your ears. Adjust the headband until it is comfortable, ideally ensuring that there is virtually no pressure felt on the ears. GUV3050 Wireless Bluetooth Headset GUV3050 Carry pouch Charging Base BT dongle USB cable Quick User Guide To avoid low or distorted sound, and to provide clear and crisp telephone calls, the microphone should be positioned within 0.5 inches of your mouth. The microphone boom arm will move in a variety of directions to ensure the best t. 1 2 Option 1 Option 1: The headset battery can be charged when connected to a PC using an USB cable (provided), or using any micro-USB charger

(not provided). Option 2: Plug the charging base into a powered USB port and then dock the headset. Option 2 Connect the GUV3050 headset Connect to PC (using BT dongle) 1. Ensure the headset is switched on. 2. Plug the BT dongle into an USB port on your PC. The headset and BT dongle are already pre-connected. Connect to mobile device (using Bluetooth) 1. Hold the On/off/connect switch in the connect position for 2 seconds until you hear the voice guided instruction. The Bluetooth indicator will flash blue. 2. Follow the voice guided instructions to connect. 3 How to use the Headset How to manage multiple calls FUNCTION ACTION Headset on Slide the On switch Headset off Slide the Off switch LED STATUS Green Light ash twice in succession Red Light ash once in succession Pairing Slide the Pair Button Blue Light ash Pairing Successfully Standby Green Light ash twice and blue light ash once in succession Blue Light ash 1 time per 8 secs Answer/End Call Tap the Multi-function button Redial/

Reject Call Double-tap the Multi-function button Adjust Volume Tap the volume up or volume down button FUNCTION ACTION End current call and answer incoming call Tap the multi-function button Put current call on hold and answer incoming call Press and hold (2 secs) the Multi-function button Switch between held call and active call Press and hold (2 secs) the Multi-function button Reject incoming call, when on a call Double-tap the Multi-function button Mute/unmute microphone Press and hold (2 secs) the volume down button This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. Certification information Common part U.S. FCC Part 15 Regulatory Information 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. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Note: 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 or more 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. Canada Regulatory Information This device complies with Innovation, Science, and Economic Development Canada license-exempt RSS standard(s). Operation is subject to the following two conditions:

(1) this device may not cause interference, and

(2) this device must accept any interference, including interference that may cause undesired operation of the device. Le prsent appareil est conforme aux CNR d' Innovation, Sciences et Dveloppement conomique Canada applicables aux appareils radio exempts de licence. L'exploitation est autorise aux deux conditions suivantes :

(1) l'appareil nedoit pas produire de brouillage, et

(2) l'utilisateur de l'appareil doit accepter tout brouillage radiolec-

trique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement. The device is compliance with RF exposure guidelines, users can obtain Canadian information on RF exposure and compliance. Le prsent appareil est conforme Aprs examen de ce matriel aux conformit ou aux limites dintensit de champ RF, les utilisateurs peuvent sur lexposition aux radiofrquences et la conformit and compliance dacqurir les informations correspondantes. Grandstream Networks, Inc. 126 Brookline Ave, 3rd Floor 02215 USA Boston, Voice: (617) 566-9300 Fax: (617) 249-1987 www.grandstream.com FCC ID: YZZGUV3050V20 For Certification, Warranty and RMA information, please visit www.grandstream.com 4 5 6

A A Model: GUV3050 HVIN:GUV3050V2 CAN ICES-3(B)/NMB-3(B) IC:11964A-GUV3050V2 FCC ID: YZZGUV3050V20 Made in China 9 8

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. 2 1 Model: GUV3050 HVIN:GUV3050V2 CAN ICES-3(B)/NMB-3(B) IC:11964A-GUV3050V2 FCC ID: YZZGUV3050V20 Made in China P/N XXX-XXXXX-XXXXXX S/N XXXXXXXXXXXXXXXX 9 8

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Grandstream Networks, Inc. Address: 126 Brookline Ave, 3rd Floor Boston, MA 02215, USA Tel.: 1-617-5669300 Fax: 1-617-2491987 E-mail: Nwei@grandstream.com FCC Confidential Authorization Date: 2021-03-05 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: YZZGUV3050V20 In accordance with Sections 0.457 and 0.459 of the Commissions Grandstream Networks, Inc. hereby requests long-term confidential treatment of information accompanying this application as outlined below:

The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Block Diagram Schematics Operation Description Sincerely Yours, Signature Name: Ning Wei Title: Manager

Grandstream Networks, Inc. Address: 126 Brookline Ave, 3rd Floor Boston, MA 02215, USA Tel.: 1-617-5669300 Fax: 1-617-2491987 E-mail: Nwei@grandstream.com FCC Authorization Date: 2021-03-05 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern:

Sincerely Yours, Signature Name: Ning Wei Title: Manager QA-FR-170-B We, Grandstream Networks, Inc. hereby authorize Bay Area Compliance Laboratories Corporation to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Bay Area Compliance Laboratory Corporation on our behalf shall have the same effect as our own action. We, Grandstream Networks, Inc. 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. 862. This authorization is valid until further written notice from the applicant.

Grandstream Networks, Inc. Address: 126 Brookline Ave, 3rd Floor Boston, MA 02215, USA Tel.: 1-617-5669300 Fax: 1-617-2491987 E-mail: Nwei@grandstream.com Date: 2021-03-05 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Dear Sir/Madam, We, Grandstream Networks, Inc. hereby authorize Shenzhen Accurate Technology Co., Ltd. to act as a laboratory for testing and test report generation for the following project(s):

(Product description: Wireless Bluetooth Headset, Model: GUV3050;

FCC ID: YZZGUV3050V20) The chipset CSR8670 used in this device for US only supports Bluetooth BDR(GFSK), EDR(/4-DQPSK, 8DPSK), other functions were disabled by software. We confirm that all information above is true, and we consequences. Please contact me if you have any question. Sincerely, ll be responsible for all the Signature:

Name: Ning Wei Title: Manager