FCC ID: 2AOVU-SEID00GSB Dongle

44.5mm 19.5mm SN: XXXXXXXXXXXXXXX Model: GuestBox Dongle FCC ID: 2AOVU-SEID00GSB IC: 5669-SEID00GSB Manufacturer: GuestBox Inc. 131 Continental Drive, Suite 301, Newark, Delaware 19713 United States of America WARNING: Cancer and Reproductive Harm -

www.P65Warnings.ca.gov. Made in china SN code 128 height 4mm, font Arial size 4pt font Arial size 3.5pt label SN: XXXXXXXXXXXXXXX Model: GuestBox Dongle FCC ID: 2AOVU-SEID00GSB IC: 5669-SEID00GSB Manufacturer: GuestBox Inc. 131 Continental Drive, Suite 301, Newark, Delaware 19713 United States of America WARNING: Cancer and Reproductive Harm -

www.P65Warnings.ca.gov. Made in china

Date: 5 September 2026 Shenzhen SEI Robotics Co., Ltd. To:

Federal Communications Commission, Authorization & Evaluation Division, 7435 Oakland Mills Road, Columbia, MD 21046 Re: Shenzhen SEI Robotics Co., Ltd. FCC ID: 2AOVU-SEID00GSB FCC Certification Confidentiality Request Gentlemen:

This letter is to comply with 47 CFR 0.457 and 0.459 pertaining to confidentiality material. Shenzhen SEI Robotics Co., Ltd. requests that the following documents regarding this submission for FCC ID: 2AOVU-SEID00GSB be kept confidential:

File Name Block Diagram.pdf Schematics.pdf Operational Description.pdf BOM.PDF General Description for UNII Devices.PDF Exhibit Type Block Diagram Schematics Operational Description BOM General Description for UNII Devices And below exhibit kept short-term confidential (180 days):

External photos Test setup photos Internal photos User manual External photos.pdf test photo.pdf Internal photos.pdf User manual.pdf Those documents contain detailed system and equipment description and related information about the product which Shenzhen SEI Robotics Co., Ltd.considers to be confidential proprietary, a custom design and, otherwise, not releasable to the general public. Since this design is a basis form which future technological products will evolve, Shenzhen SEI Robotics Co., Ltd. considers this information would be of benefit to its competitors, and that the disclosure of the information in these documents would give competitors an unfair advantage in the market. Yours Sincerely, Jason Zhao

(Shenzhen SEI Robotics Co., Ltd.) To: Federal Communications Commission Date: 2026/09/05 7435 Oakland Mills Road Columbia, MD 21046 USA Attestation Section 2.911(d)(5)(i) and Section 2.911(d)(5)(ii)

(KDB 986446 D01 Covered Equipment) Section 2.911(d)(5)(i)

[Shenzhen SEI Robotics Co., Ltd.] (the applicant) certifies that the equipment for which authorization is sought is not covered equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. The software to be loaded prior to marketing of the equipment identified below is not

"covered" software manufactured by any entity including predecessors, successors, parents, subsidiaries, or affiliates or any entity which has rebranded or relabeled the software produced by the entity(ies) identified on the "Covered List" DA 24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a).

[Shenzhen SEI Robotics Co., Ltd.] (the applicant) further certifies that no Cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software is installed in the equipment being certified. In accordance with FCC 26-50 regulations, [Shenzhen SEI Robotics Co., Ltd.] (the applicant) hereby certifies that no critical parts produced or provided by any entity on the Cover List, or their respective subsidiaries, are incorporated within the device awaiting certification. Section 2.911(d)(5)(ii)

[Shenzhen SEI Robotics Co., Ltd.] (the applicant) certifies that, as of the date of the filing of the application, the applicant [is not] identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing covered equipment. Type of Equipment subject to FCC Certification:

FCC ID:2AOVU-SEID00GSB If you have any questions, please feel free to contact me Contact Person:

Position in the Company: Manager 2026/9/5 Date of Signature:

Jason Zhao ___________________________ Signatory

(signature of the applicant)

Date: 5 September 2026 Shenzhen SEI Robotics Co., Ltd. To:

Federal Communications Commission, Authorization & Evaluation Division, 7435 Oakland Mills Road, Columbia, MD 21046 To Whom It May Concern:

The Shenzhen SEI Robotics Co., Ltd. the undersigned, hereby authorizes Mr. Wu Xuewen from Shenzhen BALUN Technology Co., Ltd., to act on the behalf of the Shenzhen SEI Robotics Co., Ltd. solely in matters relating to the application for an FCC equipment authorization for FCC ID:

2AOVU-SEID00GSB including the signing of documents in connection with this Application. Necessary acts carried out by Shenzhen BALUN Technology Co., Ltd. in connection with the Application shall have the same effect as acts of the Shenzhen SEI Robotics Co., Ltd. The Shenzhen SEI Robotics Co., Ltd. also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. Section 862. Yours Sincerely, Jason Zhao

September 7, 2026 To Whom It May Concern:

Declaration Of Identity With regards to the application for Model: GuestBox Dongle, According to the designer, Shenzhen SEI Robotics Co., Ltd. we hereby declare the difference between Model:

GuestBox Dongle and Model: SN6BTXX(X=A,B,C...X,Y,Z) as;

Basic Model Number: GuestBox Dongle Basic Brand Name: GuestBox Basic Product Name: Dongle Basic Certificate Number:

New/Additional Model Number(s):

SN6BTXX(X=A,B,C...X,Y,Z) Declare the Circuit, PCB Layout, Electrical Parts, and appearance of the following product(s) are identical to the basic model Except the following(s): Model Name The applicant changed for different market, the others are the same. Yours Sincerely, Shenzhen SEI Robotics Co., Ltd. Charge Person Printed Name: Jason Zhao Charge Person Title:Manager E-Mail: [email protected] t