2BB3X-2544Table lamp

FCC Warnning: 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 againstharmful interference in a residential installation. This equipment generates, uses and can radiateradio frequency energy and, if not installed and used in accordance with the instructions, maycause harmful interference to radio communications. However, there is no guarantee thatinterference will not occur in a particular installation. If this equipment does cause harmfulinterference to radio or television reception, which can be determined by turning the equipmentoff and on, the user is encouraged to try to correct the interference by one or more of thefollowing 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. Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void your authority to operate this equipment. 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 complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 0cm between the radiator and your body.

Shenzhen Dingdian Network Technology Co., Ltd. Room 604, Bantian Group, No. 20, Lane 1, Lishi Pai Community, Bantian Street, Longgang District, Shenzhen, China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2023/07/13 U.S. Agent Designation Shenzhen Dingdian Network Technology Co., Ltd. acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought (FCC ID: 2BB3X-2544): Name and company of U.S. agent: SUN BEYOND CONSULTING LTD Physical U.S. address of agent: OFFICE NO.448,4TH FLOOR,90 CANAL STREET BOSTON,, MA 2114 United States FRN of U.S. agent: 0033598426 Email address of U.S. agent: [email protected] SUN BEYOND CONSULTING LTD acknowledges their obligation to accept service of process on behalf of Shenzhen Dingdian Network Technology Co., Ltd. Shenzhen Dingdian Network Technology Co., Ltd. with the FRN [0034003657] accepts its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. Sincerely, Signature Yuanping Cai Manager Shenzhen Dingdian Network Technology Co., Ltd. Signature Wenchao Xiang Manager SUN BEYOND CONSULTING LTD 48_[mo del] US_Agent_2.911(d)(7) - U, V0 5

FCC ID: 2BB3X-2544 External Photos of the EUT Photo 1 Photo 2 Photo 3 FCC ID: 2BB3X-2544 Photo 4 Photo 5 Photo 6 FCC ID: 2BB3X-2544 Photo 7

Label and Location Size: L: 2.0cm*W: 1.0cm Label and Location Model No.: 2544 FCC ID : 2BB3X-2544

FCC ID: 2BB3X-2544 Internal Photos of the EUT Photo 1 Photo 2 Photo 3 FCC ID: 2BB3X-2544 Photo 4 Photo 5 Photo 6 BT/BLE Antenna FCC ID: 2BB3X-2544 Photo 7 Photo 8 Photo 9 FCC ID: 2BB3X-2544 Photo 10 Photo 11 Photo 12 FCC ID: 2BB3X-2544 Photo 13

RF Exposure evaluation FCC ID: 2BB3X-2544 1.1. Applicable Standard According to §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to §1.1310 and §2.1093 RF exposure requirement KDB447498 v06: Mobile and Portable Devices RF Exposure Procedures and Equipment Authorization Policies 1.2. Requirement According to KDB447498 D01 General RF Exposure Guidance v06 Section 4.3.1 Standalone SAR test exclusion considerations: “Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition, listed below, is satisfied. These test exclusion conditions are based on source-based time-averaged maximum conducted output power of the RF channel requiring evaluation, adjusted for tune-up tolerance, and the minimum test separation distance required for the exposure conditions.22 The minimum test separation distance is determined by the smallest distance from the antenna and radiating structures or outer surface of the device, according to the host form factor, exposure conditions and platform requirements, to any part of the body or extremity of a user or bystander (see 5) of section 4.1). To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, typically in the SAR measurement or SAR analysis report, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting is required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for the SAR test exclusion. When required, the device specific conditions described in the other published RF exposure KDB procedures must be satisfied before applying these SAR test exclusion provisions; for example, handheld PTT two-way radios, handsets, laptops & tablets etc.23 “ [(max. power of channel, including tune-up tolerance, mW)/ (min. test separation distance, mm)] · [√f (GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where: • f (GHz) is the RF channel transmit frequency in GHz • Power and distance are rounded to the nearest mW and mm before calculation • The result is rounded to one decimal place for comparison • 3.0 and 7.5 are referred to as the numeric thresholds in the step 2 below The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm according to 5) in section 4.1 is applied to determine SAR test exclusion. 1.3. Manufacturing tolerance BLE GFSK (Peak) Channel Channel 0 Channel 19 Channel 39 Target (dBm) 4.0 4.0 4.0 Tolerance ±(dB) 1.0 1.0 1.0 BT GFSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) -1.0 -1.0 -1.0 Tolerance ±(dB) 1.0 1.0 1.0 Π/4DQPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) -1.0 -1.0 -1.0 Tolerance ±(dB) 1.0 1.0 1.0 Page 2 of 2 2. E v a l u a t i o n R e s u l t Evaluation Results Band/Mode f (GHz) Antenna Distance (mm) RF output power (including tune-up tolerance) SAR Test Exclusion Threshold SAR Test Exclusion dBm mW BT 2.450 5 5.0 3.1623 0.9899<3.0 Yes 3. C o n c l u s i o n The measurement results comply with the FCC Limit per 47 CFR 2.1093 for the uncontrolled RF Exposure and SAR Exclusion Threshold per KDB 447498 v06 .....................End of Report.........................

1. Antenna Description: Antenna type PCB antenna Model 2544 Frequency range 2400-2500MHz Manufacturer Shenzhen Dingdian Network Technology Co., Ltd. ANT Peak Gain 0.78 dBi 2. Antenna Photo: Length :14.52mm Width:3.21mm 3. Test Equipment & Conditions 3.1 Test instrument VSWR is tested using Agilent E5071B connected to a hand mechanism, and the status is free space. 3.2 Test environment and methods 4．Antenna Radiation Pattern 2400MHz 2450MHz 2500MHz

Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. ..................... : FCC ID. ............................................ : CTA23071000302 2BB3X-2544 Compiled by ( position+printed name+signature) .. : File administrators Zoey Cao Supervised by ( position+printed name+signature) .. : Project Engineer Amy Wen Approved by ( position+printed name+signature) .. : RF Manager Eric Wang Date of issue ..................................... : Jul. 12, 2023 Testing Laboratory Name .............. : Shenzhen CTA Testing Technology Co., Ltd. Address ............................................ : Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao‘an District, Shenzhen, China Applicant’s name ............................ : Shenzhen Dingdian Network Technology Co., Ltd. Address ............................................ : Room 604, Bantian Group, No. 20, Lane 1, Lishi Pai Community, Bantian Street, Longgang District, Shenzhen, China Test specification ...........................: Standard ........................................... : FCC Part 15.247 Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description .....................: Table lamp Trade Mark ....................................... : N/A Manufacturer .................................... : Shenzhen Dingdian Network Technology Co., Ltd. Model/Type reference....................... : 2544 Listed Models .................................. : 2544-1, 2544-2, 2544-3, 2544-4 Modulation ....................................... : GFSK, Π/4DQPSK Frequency .......................................... From 2402MHz to 2480MHz Rating ............................................... : DC 3.7V From Battery and DC 5.0V From external circuit Result................................................ : PASS Report No.: CTA23071000302 Page 2 of 39 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : Table lamp Model /Type : 2544 Listed Models : 2544-1, 2544-2, 2544-3, 2544-4 Applicant : Shenzhen Dingdian Network Technology Co., Ltd. Address : Room 604, Bantian Group, No. 20, Lane 1, Lishi Pai Community, Bantian Street, Longgang District, Shenzhen, China Manufacturer : Shenzhen Dingdian Network Technology Co., Ltd. Address : Room 604, Bantian Group, No. 20, Lane 1, Lishi Pai Community, Bantian Street, Longgang District, Shenzhen, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: CTA23071000302 Page 3 of 39 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 T E S T S T A N D A R D S ................................................................. 4 2 S U M M A R Y ............................................................................ 5 2.1 General Remarks 5 2.2 Product Description 5 2.3 Equipment Under Test 5 2.4 Short description of the Equipment under Test (EUT) 5 2.5 EUT operation mode 5 2.6 Block Diagram of Test Setup 6 2.7 Related Submittal(s) / Grant (s) 6 2.8 Modifications 6 3 T E S T E N V I R O N M E N T .............................................................. 7 3.1 Address of the test laboratory 7 3.2 Test Facility 7 3.3 Environmental conditions 7 3.4 Summary of measurement results 8 3.5 Statement of the measurement uncertainty 8 3.6 Equipments Used during the Test 9 4 TE S T C O N D I T I O N S A N D R E S U L T S ........................................... 10 4.1 AC Power Conducted Emission 10 4.2 Radiated Emission 13 4.3 Maximum Peak Output Power 19 4.4 20dB Bandwidth 20 4.5 Frequency Separation 23 4.6 Number of hopping frequency 25 4.7 Time of Occupancy (Dwell Time) 27 4.8 Out-of-band Emissions 30 4.9 Antenna Requirement 37 5 T E S T S E T U P P H O T O S O F T H E E U T ......................................... 38 6 P H O T O S O F T H E E U T ........................................................... 39 Report No.: CTA23071000302 Page 4 of 39 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 1 T E S T S T A N D A R D S The tests were performed according to following standards: FCC Rules Part 15.247: Frequency Hopping, Direct Spread Spectrum and Hybrid Systems that are in operation within the bands of 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz. ANSI C63.10-2013: American National Standard for Testing Unlicensed Wireless Devices Report No.: CTA23071000302 Page 5 of 39 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mai…

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FCC ID: 2BB3X-2544 Test Setup Photos of the EUT