2ALZL-F3800XA5.1 BLUETOOTH MULTIMEDIA SPEAKER SYSTE

Goldwood Sound, Inc. Agent Authorization Company: Goldwood Sound, Inc. Address: 9333 Oso Ave.Chatsworth, CA 91311 Product Name: 5.1 BLUETOOTH MULTIMEDIA SPEAKER SYSTE Model Number(s): F3800X, AA5400 Product Description: 5.1 BLUETOOTH MULTIMEDIA SPEAKER SYSTE 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: 2021/01/19 Name: Marty Bloom Title: General Manager Company: Goldwood Sound, Inc.

Goldwood Sound, Inc. Family models declaration letter. 2021-01-19 We Goldwood Sound, Inc. Of 9333 Oso Ave. Chatsworth, CA 91311 Product: 5.1 BLUETOOTH MULTIMEDIA SPEAKER SYSTEM FCC ID: 2ALZL-F3800XA Model Name: F3800X Family Model: AA5400 All the model are the same circuit and RF module, except the model No.. Thanks Sincerely, Signature 2021-01-19 Name: Marty Bloom Title: General Manager

< Goldwood Sound, Inc.> Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2021/01/19 Subject; Request for Confidentiality FCC ID: 2ALZL-F3800XA 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 Operational Description In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuantto KDB 726920 D01. 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: Marty Bloom Title: General Manager Email: [email protected]

S20121404601 Model: F3800X Photo 1 Photo 2 S20121404601 Model: F3800X Photo 3 Photo 4 S20121404601 Model: F3800X Photo 5 Photo 6 S20121404601 Model: F3800X Photo 7

100-240V ~50/60Hz 1A MODEL NO.:AA5400 FCC ID:2ALZL-F3800XA 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. Made in China

S20121404601 Model: F3800X Photo 1 Photo 2 S20121404601 Model: F3800X Photo 3 Photo 4 ANT S20121404601 Model: F3800X Photo 5 Photo 6 S20121404601 Model: F3800X Photo 7 Photo 8 S20121404601 Model: F3800X Photo 9 Photo 10

FCC ID: 2ALZL-F3800XA RF EXPOSURE EVALUATION According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency(RF) Radiation as specified in §1.1307(b) Limits for Maximum Permissible Exposure (MPE) MPE Calculation Method E (V/m) ＝ d GP**30 Power Density: Pd (W/m²) ＝ 377 2 E E ＝ Electric field (V/m) P ＝ Average RF output power (W) G ＝ EUT Antenna numeric gain (numeric) d ＝ Separation distance between radiator and human body (m) The formula can be changed to Pd ＝ 2 *377 **30 D GP From the EUT RF output power, the minimum mobile separation distance, d=0.2m, as well as the gain of the used antenna, the RF power density can be obtained. Measurement Result Operation Frequency: BT: 2402-2480MHz Power density limited: 1mW/ cm 2 Antenna Type: PCB Antenna Antenna gain: 2dBi, R=20cm conducted power Evaluation result Power density Limits (dBm)(mW)(dBi)Numeric 2402 -1.57 -2±1-1 0.7942.001.580.00031 2441 -1.2 -2±1-1 0.7942.001.580.00031 2480 -2.63 -2±1-1 0.7942.001.580.00031 2402 -2.88 -3±1-2 0.6312.001.580.00021 2441 -2.54 -3±1-2 0.6312.001.580.00021 2480 -2.31 -3±1-2 0.6312.001.580.00021 (mW/cm2 )(mW/cm2) Antenna Gain GFSK Max tune-up power Channel Freq. (MHz) modulation Tune-up power (dBm) (dBm) π/4-DQPSK Conclusion: For the max result : 0.0003≤ 1.0 for Max Power Density, compliance RF exposure.. Signature: Date: 2021-01-19 NAME AND TITLE (Please print or type): Alex Li/Manager COMPANY (Please print or type): Shenzhen NTEK Testing Technology Co., Ltd./ 1/F, Building E, Fenda Science Park, Sanwei Community, Xixiang Street Bao’an District, Shenzhen P.R. China.

Report No.: S20121404601001 Version.1.3 Page 1 of 67 RADIO TEST REPORT FCC ID: 2ALZL-F3800XA Product: 5.1 BLUETOOTH MULTIMEDIA SPEAKER SYSTE Trade Mark: Acoustic Audio Model No.: F3800X Family Model: AA5400 Report No.: S20121404601001 Issue Date: 30 Dec. 2020 Prepared for Goldwood Sound, Inc. 9333 Oso Ave.Chatsworth, CA 91311 Prepared by Shenzhen NTEK Testing Technology Co., Ltd. 1/F, Building E, Fenda Science Park, Sanwei Community, Xixiang Street Bao’an District, Shenzhen 518126 P.R. China Tel:400-800-6106 , 0755-3699-5508 Website:http://www.ntek.org.cn Report No.: S20121404601001 Version.1.3 Page 2 of 67 TABLE OF CONTENTS 1 TEST RESULT CERTIFICATION ...................................................................................................................... 3 2 SUMMARY OF TEST RESULTS ......................................................................................................................... 4 3 FACILITIES AND ACCREDITATIONS ............................................................................................................. 5 3.1 FACILITIES..................................................................................................................................................... 5 3.2 LABORATORY ACCREDITATIONS AND LISTINGS ................................................................................. 5 3.3 MEASUREMENT UNCERTAINTY ............................................................................................................... 5 4 GENERAL DESCRIPTION OF EUT .................................................................................................................. 6 5 DESCRIPTION OF TEST MODES ..................................................................................................................... 8 6 SETUP OF EQUIPMENT UNDER TEST ........................................................................................................... 9 6.1 BLOCK DIAGRAM CONFIGURATION OF TEST SYSTEM ....................................................................... 9 6.2 SUPPORT EQUIPMENT............................................................................................................................... 10 6.3 EQUIPMENTS LIST FOR ALL TEST ITEMS .............................................................................................. 11 7 TEST REQUIREMENTS .................................................................................................................................... 13 7.1 CONDUCTED EMISSIONS TEST ............................................................................................................... 13 7.2 RADIATED SPURIOUS EMISSION ............................................................................................................ 16 7.3 NUMBER OF HOPPING CHANNEL ........................................................................................................... 25 7.4 HOPPING CHANNEL SEPARATION MEASUREMENT ........................................................................... 26 7.5 AVERAGE TIME OF OCCUPANCY (DWELL TIME) ................................................................................ 27 7.6 20DB BANDWIDTH TEST .......................................................................................................................... 29 7.7 PEAK OUTPUT POWER .............................................................................................................................. 30 7.8 CONDUCTED BAND EDGE MEASUREMENT......................................................................................... 31 7.9 SPURIOUS RF CONDUCTED EMISSION .................................................................................................. 32 7.10 ANTENNA APPLICATION .......................................................................................................................... 33 7.11 FREQUENCY HOPPING SYSTEM (FHSS) EQUIPMENT REQUIREMENTS .............................................. 34 8 TEST RESULTS ................................................................................................................................................... 35 8.1 DWELL TIME ................................................................................................................................................... 35 8.2 MAXIMUM CONDUCTED OUTPUT POWER ....................................................................................................... 39 8.3 OCCUPIED CHANNEL BANDWIDTH .................................................................................................................. 43 8.4 CARRIER FREQUENCIES SEPARATION .............................................................................................................. 47 8.5 NUMBER OF HOPPING CHANNEL ..................................................................................................................... 51 8.6 BAND EDGE .................................................................................................................................................... 52 8.7 CONDUCTED RF SPURIOUS EMISSION ............................................................................................................. 61 Report No.: S20121404601001 Version.1.3 Page 3 of 67 1 TEST RESULT CERTIFICATION Applicant’s name ......................... : Goldwood Sound, Inc. Address ....................................... : 9333 Oso Ave.Chatsworth, CA 91311 Manufacturer's Name .................. : SHENZHEN FENDA TECHNOLOGY CO., LTD. Address ....................................... : Fenda Hi-Tech Park, Zhoushi Road, Shiyan Town,Baoan District, Shenzhen City, Guangdong, China Product description Product name .............................. : 5.1 BLUETOOTH MULTIMEDIA SPEAKER SYSTE Model and/or type reference ..... : F3800X Family Model ............................... : AA5400 Measurement Procedure Used: APPLICABLE STANDARDS STANDARD/ TEST PROCEDURE TEST RESULT FCC 4…

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Radiated Measurement Photos Conducted Measurement Photos