2ASCB-DGSNCKNT3232 inch Non Touch LCD Digital Screen

D2GGroupLLC Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date:2020-08-12 Subject; Request for Long Term Confidentiality FCC ID: 2ASCB-DGSNCKNT32 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Rodney Washington Title: VP, Merchandising

D2G Group LLC 81 Commerce Drive, Fall River, Massachusetts 02720, United States Statement Product: 32 inch Non Touch LCD Digital Screen Model: DGSNCKNT32 Additional Model: ADMA02N Trademark: N/A We hereby state that All models above are identical in interior structure, electrical circuits and components, and just model names are different for the marketing requirement. Your assistance on this matter is highly appreciated. Yours sincerely, Signature: Date: 2020-08-12 Name: Rodney Washington Company Name: D2G Group LLC Address: 81 Commerce Drive, Fall River, Massachusetts 02720, United States Tel / Fax: 5086897117/888-875-4507 E-Mail: [email protected]

D2G Group LLC Agent Authorization Company: D2G Group LLC Address: 81 Commerce Drive, Fall River, Massachusetts 02720, United States Product Name: 32 inch Non Touch LCD Digital Screen Model Number(s): DGSNCKNT32, ADMA02N Product Description: 32 inch Non Touch LCD Digital Screen We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: 2020-08-12 Name:Rodney Washington Title:VP, Merchandising Company: D2G Group LLC

Page 1 of 4 Appendix B: Photographs of EUT Product: 32 inch Non Touch LCD Digital Screen Model: DGSNCKNT32 External Photos Page 2 of 4 Page 3 of 4 Page 4 of 4

Label Artwork and Location Model: DGSNCKNT32 Label: Size: L*W=50.8*25.4mm Location

Page 1 of 15 Appendix B: Photographs of EUT Product: 32 inch Non Touch LCD Digital Screen Model: DGSNCKNT32 Internal Photos Antenna Page 2 of 15 Page 3 of 15 Page 4 of 15 Page 5 of 15 Page 6 of 15 Page 7 of 15 Page 8 of 15 Page 9 of 15 Page 10 of 15 Page 11 of 15 Page 12 of 15 Page 13 of 15 Page 14 of 15 Page 15 of 15

Maximum Permissible Exposure FCC ID: 2ASCB-DGSNCKNT32 Applicable Standard According to §1.1307(b), systems operating under the provisions of this section shall be operated in a manner that ensure that the public is not exposed to radio frequency energy level in excess of the Commission’s guideline. For BT: Remark: 1) The maximum output power for antenna is 2.84dBm (1.92mW) at 2402MHz, 5dBi antenna gain(with 3.16 numeric antenna gain.) 2) For mobile or fixed location transmitters, no SAR consideration applied. The minimum separation generally be used is at least 20cm, even if the calculation indicate that the MPE distance would be lesser. Maximum Permissible Exposure output power= 1.92mW Numeric Antenna gain= 3.16 Substituting the MPE safe distance using d=20cm into above equation. Yields: S=0.000199*P*G Where P=Power in mW G=Numeric antenna gain S=Power density in mW/cm 2 Power density= 0.001207mW/cm 2 (For mobile or fixed location transmitters, the maximum power density is 1.0 mW/cm 2 even if the calculation indicates that the power density would be larger.) For WIFI: Remark: 1) The maximum output power for antenna is 16.16dBm (41.30mW) at 2462MHz, 5dBi antenna gain(with 3.16 numeric antenna gain.) 2) For mobile or fixed location transmitters, no SAR consideration applied. The minimum separation generally be used is at least 20cm, even if the calculation indicate that the MPE distance would be lesser. Maximum Permissible Exposure output power=41.30mW Numeric Antenna gain= 3.16 Substituting the MPE safe distance using d=20cm into above equation. Yields: S=0.000199*P*G Where P=Power in mW G=Numeric antenna gain S=Power density in mW/cm 2 Power density= 0.025971mW/cm 2 (For mobile or fixed location transmitters, the maximum power density is 1.0 mW/cm 2 even if the calculation indicates that the power density would be larger.)

Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com TEST REPORT FCC ID: 2ASCB-DGSNCKNT32 Product: 32 inch Non Touch LCD Digital Screen Model No.: DGSNCKNT32 Additional Model No.: ADMA02N Trade Mark: N/A Report No.: TCT200716E006 Issued Date: Oct. 10, 2020 Issued for: D2G Group LLC 81 Commerce Drive, Fall River, Massachusetts 02720, United States Issued By: Shenzhen Tongce Testing Lab. 1B/F., Building 1, Yibaolai Industrial Park, Qiaotou, Fuyong, Baoan District, Shenzhen, Guangdong, China TEL: +86-755-27673339 FAX: +86-755-27673332 Note: This report shall not be reproduced except in full, without the written approval of Shenzhen Tongce Testing Lab. This document may be altered or revised by Shenzhen Tongce Testing Lab. personnel only, and shall be noted in the revision section of the document. The test results in the report only apply to the tested sample. Report No.: TCT200716E006 Page 2 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com TABLE OF CONTENTS 1. Test Certification ..................................................................................... 3 2. Test Result Summary .............................................................................. 4 3. EUT Description ....................................................................................... 5 4. General Information ................................................................................. 6 4.1. Test environment and mode ................................................................................. 6 4.2. Description of Support Units ................................................................................ 6 5. Facilities and Accreditations .................................................................. 7 5.1. Facilities ................................................................................................................. 7 5.2. Location ................................................................................................................. 7 5.3. Measurement Uncertainty ..................................................................................... 7 6. Test Results and Measurement Data ..................................................... 8 6.1. Antenna requirement ............................................................................................ 8 6.2. Conducted Emission ............................................................................................. 9 6.3. Conducted Output Power ................................................................................... 13 6.4. 20dB Occupy Bandwidth .................................................................................... 18 6.5. Carrier Frequencies Separation ......................................................................... 23 6.6. Hopping Channel Number .................................................................................. 28 6.7. Dwell Time ............................................................................................................ 31 6.8. Pseudorandom Frequency Hopping Sequence ................................................ 36 6.9. Conducted Band Edge Measurement ................................................................ 37 6.10.Conducted Spurious Emission Measurement .................................................. 41 6.11.Radiated Spurious Emission Measurement ..................................................... 45 Appendix A: Photographs of Test Setup Appendix B: Photographs of EUT Report No.: TCT200716E006 Page 3 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 1. Test Certification Product: 32 inch Non Touch LCD Digital Screen Model No.: DGSNCKNT32 Additional Model: ADMA02N Trade Mark: N/A Applicant: D2G Group LLC Address: 81 Commerce Drive, Fall River, Massachusetts 02720, United States Manufacturer: GUANGZHOU YOUGUANG OPTOELECTRONICS CO., LTD. Address: No. 75, Pacific Ind. Zone, Xingtang Town, Zengcheng, Guangzhou, 511340 China Date of Test: Jul. 17, 2020 – Oct. 10, 2020 Applicable Standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247 FCC KDB 558074 D01 15.247 Meas Guidance v05r02 ANSI C63.10:2013 The above equipment has been tested by Shenzhen Tongce Testing Lab. and found compliance with the requirements set forth in the technical standards mentioned above. The results of testing in this report apply only to the product/system, which was tested. Other similar equipment will not necessarily produce the same results due to production tolerance and measurement uncertainties. Tested By: Date: Oct. 10, 2020 Rleo Reviewed By: Date: Oct. 10, 2020 Beryl Zhao Approved By: Date: Oct. 10, 2020 Tomsin Report No.: TCT200716E006 Page 4 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 2. Test Result Summary Requirement CFR 47 Section Result Antenna Requirement §15.203/§15.247 (c) PASS AC Power Line Conducted Emission §15.207 PASS Conducted Peak Output Power §15.247 (b)(1) PASS 20dB Occupied Bandwidth §15.247 (a)(1) PASS Carrier Frequencies Separation §15.247 (a)(1) PASS Hopping Channel Number §15.247 (a)(1) PASS Dwell Time §15.247 (a)(1) PASS Radiated Emission §15.205/§15.209 PASS Band Edge §15.247(d) PASS Note: 1. PASS: Test item meets the requirement. 2. Fail: Test item does not meet the requirement. 3. N/A: Test case does not apply to the test object. 4. The test result judgment is decided by the limit of test standard. Report No.: TCT200716E006 Page 5 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 3. EUT Description Product Name: 32 inch Non Touch LCD Digital Screen Model : DGSNCKNT32 Additional Model: ADMA02N Trade Mark: N/A Bluetooth version: V4.2 Operation Frequency: 2402MHz~2480MHz Transfer Rate: 1/2/3 Mbits/s Number of Channel: 79 Modulation Type: GFSK, π/4-DQPSK, 8DPSK Modulation Technology: FHSS Antenna Type: Intern…

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Report No.: TCT200716E006 Page 36 of 76 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 6.8. Pseudorandom Frequency Hopping Sequence Test Requirement: FCC Part15 C Section 15.247 (a)(1) requirement: Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hopping channel, whichever is greater. Alternatively. Frequency hopping systems operating in the 2400-2483.5 MHz band may have hopping channel carrier frequencies that are separated by 25 kHz or two-thirds of the 20 dB bandwidth of the hopping channel, whichever is greater, provided the systems operate with an output power no greater than 125 mW. The system shall hop to channel frequencies that are selected at the system hopping rate from a Pseudorandom ordered list of hopping frequencies. Each frequency must be used equally on the average by each transmitter. The system receivers shall have input bandwidths that match the hopping channel bandwidths of their corresponding transmitters and shall shift frequencies in synchronization with the transmitted signals. EUT Pseudorandom Frequency Hopping Sequence The pseudorandom sequence may be generated in a nine-stage shift register whose 5th and 9th stage outputs are added in a modulo-two addition stage. And the result is fed back to the input of the first stage. The sequence begins with the first one of 9 consecutive ones; i.e. the shift register is initialized with nine ones. • Number of shift register stages: 9 • Length of pseudo-random sequence: 2 9 -1 = 511 bits • Longest sequence of zeros: 8 (non-inverted signal) An example of Pseudorandom Frequency Hopping Sequence as follow: Each frequency used equally on the average by each transmitter. The system receivers have input bandwidths that match the hopping channel bandwidths of their corresponding transmitters and shift frequencies in synchronization with the transmitted signals. Report No.: TCT200716E006 Page 37 of 76 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 6.9. Conducted Band Edge Measurement 6.9.1. Test Specification Test Requirement: FCC Part15 C Section 15.247 (d) Test Method: KDB 558074 D01 v05r02 Limit: In any 100 kHz bandwidth outside the intentional radiation frequency band, the radio frequency power shall be at least 20 dB below the highest level of the radiated power. In addition, radiated emissions which fall in the restricted bands must also comply with the radiated emission limits. Test Setup: Test Mode: Transmitting mode with modulation Test Procedure: 1. Set to the maximum power setting and enable the EUT transmit continuously. 2. Set RBW = 100 kHz (≥1% span=10MHz), VBW = 300 kHz (≥RBW). Band edge emissions must be at least 20 dB down from the highest emission level within the authorized band as measured with a 100kHz RBW. The attenuation shall be 30 dB instead of 20 dB when RMS conducted output power procedure is used. 3. Enable hopping function of the EUT and then repeat step 2 and 3. 4. Measure and record the results in the test report. Test Result: PASS 6.9.2. Test Instruments Equipment Manufacturer Model Serial Number Calibration Due Spectrum Analyzer Agilent N9020A MY49100619 Sep. 11, 2020 RF cable (9kHz-26.5GHz) TCT RE-06 N/A Sep. 11, 2020 Antenna Connector TCT RFC-01 N/A Sep. 11, 2020 Note: The calibration interval of the above test instruments is 12 months and the calibrations are traceable to international system unit (SI). Report No.: TCT200716E006 Page 38 of 76 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 6.9.3. Test Data GFSK Modulation Test channel: Lowest channel No-hopping mode Hopping mode Test channel: Highest channel No-hopping mode Hopping mode Report No.: TCT200716E006 Page 39 of 76 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Pi/4DQPSK Modulation Test channel: Lowest channel No-hopping mode Hopping mode Test channel: Highest channel No-hopping mode Hopping mode Report No.: TCT200716E006 Page 40 of 76 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 8DPSK Modulation Test channel: Lowest channel No-hopping mode Hopping mode Test channel: Highest channel No-hopping mode Hopping mode Report No.: TCT200716E006 Page 41 of 76 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 6.10. Conducted Spurious Emission Measurement 6.10.1. Test Specification Test Requirement: FCC Part15 C Section 15.247 (d) Test Method: KDB 558074 D01 v05r02 Limit: In any 100 kHz bandwidth outside the intentional radiation frequency band, the radio frequency power shall be at least 20 dB below the highest level of the radiated power. In addition, radiated emissions which fall in the restricted bands must also comply with the radiated emission limits. Test Setup: Test Mode: Transmitting mode with modulation Test Procedure: 1. The RF output of EUT was connected to the spectrum analyzer by RF cable and attenuator. The path loss was compensated to the results for each measurement. 2. Set to the maximum power setting and enable the EUT transmit continuously. 3. Set RBW = 100 kHz, VBW = 300kHz, scan up through 10th harmonic. All harmonics / spurs must be at least 20 dB down from the highest emission level within the authorized band as measured with a 100 kHz RBW. 4. Measure and record the results in the test report. 5. The RF fundamental frequency should be excluded against the limit line in the operating frequency band. Test Result: PASS 6.10.2. Test Instruments Equipment Manufacturer Model Serial Number Calibration Due Spectrum Analyzer Agilent N9020A MY49100619 Sep. 11, 2020 Spectrum Analyzer ROHDE&SCH WARZ FSQ40 200061 Sep. 11, 2020 RF Cable (9KHz-26.5GHz) TCT RE-06 N/A Sep. 11, 2020 Antenna Connector TCT RFC-01 N/A Sep. 11, 2020 Note: The calibration interval of the above test instruments is 12 months and the calibratio…

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Report No.: TCT200716E006 Page 56 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Conducted Emission Report No.: TCT200716E006 Page 57 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Appendix B: Photographs of EUT Product: 32 inch Non Touch LCD Digital Screen Model: DGSNCKNT32 External Photos Report No.: TCT200716E006 Page 58 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 59 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 60 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 61 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Product: 32 inch Non Touch LCD Digital Screen Model: DGSNCKNT32 Internal Photos Report No.: TCT200716E006 Page 62 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 63 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 64 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 65 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 66 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 67 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 68 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 69 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 70 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 71 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 72 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 73 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 74 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT200716E006 Page 75 of 75 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com *****END OF REPORT*****

Page 1 of 2 Appendix A: Photographs of Test Setup Product: 32 inch Non Touch LCD Digital Screen Model: DGSNCKNT32 Radiated Emission Page 2 of 2 Conducted Emission