2ANDL-VWRK4Smart Audio Module with Wi-Fi and Bluetooth

1 TUYA AVS Smart Audio Module-VWRK4 User Manual TUYA AVS Smart Audio Module-VWRK4 Version：V1.0.1 User Manual 2 Version Update content Name 1.0 The user manual of VWRK4 Jia Zeng/ Renfang Li 1.1 Increase the introduction of amazon and app operation Jia Zeng 1.2 Increase the introduction of voice kit VWRK4 Jia Zeng /Yongguang Zhu 3 1、Product Abstract Tuya AVS voice module VWRK4 is based on the powerful RockChip 3308 IC which integrated with 4-Core 64 bit A35 ARM Core. The Module is integrated with voice wake & noise cancellation algorithm and which can be applied in the IoT device/gateway/smart speaker. The CPU RK3308’s frequency is 1.3GHz, which can provide powerful computing ability. Also, the module is integrated with the RF chip RTL8723DS which contains WiFi Sing-band 1X1+BluetoothBR/EDR/BLE4.0 This can make it easy to connect to the Tuya IoT platform. 1.1 Features  High powerful ARM 4-Core 64 bit A35 RochChip 3308 CPU  Frequency ：1.3GHz  Work voltage: 4.2-5.5V（5V default）  Peripheral：2*Uart，7*MIC，RGB666，1*SPI，2*I2C，2*USB, GPIOs，3*ADC，  Antenna：IPEX  Sampling Rate:16K/16bit  Audio Feature 1) 4 ways mic pickup, stereo playback. 2) 6 ways mic pickup, single channel playback. 3) Audio output: stereo HPOUT and stereo LINEOUT 4) Audio AUX IN: support  Entertainment： Approved：amazon music, audible, iHeartRadio, TuneIn  Skill：All the skills contains in Alexa. For example: Newest arrivals, Business & finance, Connected Car,Education & Reference, Food &Drink, Game & Trivia, Health & Fitness, kids, lifestyle, local, Movies & TV, Music & Audio, News, Novelty & Humor, Productivity, Shopping, Smart Home, Sports, Travel & Transportation, Utilities,Weather. 4 1.2 Applications  Smart household and home appliances  Smart Device  Net Gateway Control  Voice Control Panel 5 2、Module Interfaces 2.1 Dimensions and Footprint The Module has four rows of pins with 1mm Pin Width and 1.5mm pin spacing，the total number of pins is 82，and its dimensions is 35mm*35mm*3.2mm（W*L*H），Figure 2-1 shows the Dimension views. Note: The default dimensional tolerance is ±0.35mm. Figure 2-1 Dimensions of VWRK4 The total pins is 82 and the opposite side has the same number pins, one side is 20 and the other is 21. Figure 2-2 shows the footprint views. Figure 2-2 Footprint of VWRK4 6 2.2 Circuit Diagram Table 2-1 Hardware Feature MCU RK3308 Flash 128 MByte DDR 128 MByte Mic 2/4 mic array BT BluetoothBR/EDR/BLE4.0 WIFI IEEE 802.11b/g/n (channel 1-14) Power Interface MicroUSB 5V1A Antenna IPEX Antenna Audio MIC/HPOUT/LINEOUT LCD LCD Interface Interface Reserved UART/IIC/PWM/GPIO/USB interface  Circuit Diagram of VWRK4 voice kit Figure 2-3 Circuit Diagram of VWRK4 7 2.3 Pin Definition Table 2-2 Pin Definition of VWRK4 Pin No. Pin Name Pad Type Function 1 GND P Power Supply reference ground pin 2 ANT O The RF ANT Interface 3 GND P Power Supply reference ground pin 4 ADC_KEY_IN2 AI Analog of ADC Input 5 SAR_ADC_IN3 AI Analog of ADC Input 6 UNO_RX I/O Debug UART RX 7 UNO_TX I/O Debug UART TX 8 USB_HOST_DM I/O USB Data PIN for Host 9 USB_HOST_DP I/O USB Data PIN for Host 10 USB_OTG_ID I/O USB ID PIN for OTG 11 USB_OTG_DM I/O USB Data PIN for OTG 12 USB_OTG_DP I/O USB Data PIN for OTG 13 PHONE_CTRL I/O The General I/O Pin 14 PHONE_DET I/O The General I/O Pin 15 AUX_IN_CTRL I/O Selection of HPout or Lineout/ General I/O 16 SPK_MUTE I/O Speaker mute Control Pin /The General I/O Pin 17 MIC_LED I/O Control of Led Peripherals/ General I/O 18 GND P Power Supply reference ground pin 19 VCC-IO_OUT P Power supply pin for Peripherals 20 GND P Power Supply reference ground pin 21 VCC-5V P Power supply pin(5V) 22 VCC-5V P Power supply pin(5V) 23 GND P Power Supply reference ground pin 8 24 IR_RX I/O IR Receive Pin / General IO Pin 25 IR_TX I/O IR Tranmit Pin / General IO Pin 26 I2C_SDA I/O I2C SDA for Peripherals 27 I2C_CLK I/O I2C CLK for Peripherals 28 LCD_PWR I/O LCD Power Control Pin 29 LCD_BL I/O LCD Back light / General IO Pin/PWM 30 LCD_RST I/O LCD Reset Pin / General IO Pin 31 LCD_DEN I/O LCD Data Enable/ General IO Pin 32 LCD_HS I/O LCD Horizontal sync PIN/ General IO Pin 33 LCD_VS I/O LCD Vertical sync PIN/ General IO Pin 34 LCD_CLK I/O LCD Clk Pin / General IO Pin 35 LCD_D0 I/O LCD Data Pin / General IO Pin 36 LCD_D1 I/O LCD Data Pin / General IO Pin 37 LCD_D2 I/O LCD Data Pin / General IO Pin 38 LCD_D3 I/O LCD Data Pin / General IO Pin 39 LCD_D4 I/O LCD Data Pin / General IO Pin 40 LCD_D5 I/O LCD Data Pin / General IO Pin 41 LCD_D6 I/O LCD Data Pin / General IO Pin 42 LCD_D11 I/O LCD Data Pin / General IO Pin 43 LCD_D10 I/O LCD Data Pin / General IO Pin 44 LCD_D8 I/O LCD Data Pin / General IO Pin 45 LCD_D7 I/O LCD Data Pin / General IO Pin 46 LCD_D13 I/O LCD Data Pin / General IO Pin 47 LCD_D14 I/O LCD Data Pin / General IO Pin 48 LCD_D9 I/O LCD Data Pin / General IO Pin 49 LCD_D17 I/O LCD Data Pin / General IO Pin 9 50 LCD_D12 I/O LCD Data Pin / General IO Pin 51 LCD_D15 I/O LCD Data Pin / General IO Pin 52 LCD_D16 I/O LCD Data Pin / General IO Pin 53 LCD_SPI_RX I/O SPI Data Pin for LCD / General IO Pin 54 LCD_SPI_CLK I/O SPI CLk Pin for LCD / General IO Pin 55 LCD_SPI_CS I/O SPI CS Pin for LCD / General IO Pin 56 LCD_SPI_TX I/O SPI Data Pin for LCD / General IO Pin 57 GND P Power Supply reference ground pin 58 HPOUT_R AO Headphone output Right 59 HPOUT_L AO Headphone output Left 60 LINEOUT_R O Line output Right 61 LINEOUT_L O Line output Left 62 MIC2N AI The Audio Analog input 63 MIC2P AI The Audio Analog input 64 MIC3N AI The Audio Analog input 65 MIC3P AI The Audio Analog input 66 MIC4N AI The Audio Analog input 67 MIC4P AI The Audio Analog input 68 MIC5N AI The Audio Analog input 69 MIC5P AI The Audio Analog input 70 MIC6N AI The Audio Analog input 71 MIC6P AI The Audio Analog input 72 MIC7N AI The Audio Analog input 73 MIC7P AI The Audio Analog input 74 MIC8N AI The Audio Analog input 75 MIC8P AI The Audio Analog input 10 76 GND P Power Supply reference ground pin 77 AP_CTS I/O UART1 CTS PIN / General IO Pin 78 AP_RTS …

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Company: Hangzhou Tuya Information Technology Co.,Ltd Address: Room701,Building3,More Center,No.87 GuDun Road, Hangzhou,Zhejiang, China Tel: 86-571-86581786 Fax: 86-571-86581786 Date (07/16/2020) TUV SUD BABT TCB Octagon House, Segensworth Road, Fareham, Hampshire, PO15 5RL Confidentiality Request FCC ID: 2ANDL-VWRK4 Pursuant to Sections 0.457(d)(1)(ii) and 0.459 of the Commission’s Rules, (Hangzhou Tuya Information Technology Co.,Ltd) hereby requests permanent confidential treatment of information accompanying this application as outlined below: Schematics Bill of Materials/Parts List Block Diagrams Theory of Operation The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these matters might be harmful to the Applicant and provide unjustified benefits to its competitors. The Applicant understands that pursuant to Rule 0.457(d)(1)(ii), disclosure of this Application and all accompanying materials will not be made before the date of the Grant for this Application. Yours sincerely, Company Officer: Telephone Number: 86-571-86581786 Email: [email protected]

Company: Hangzhou Tuya Information Technology Co.,Ltd Address: Room701,Building3,More Center,No.87 GuDun Road, Hangzhou,Zhejiang, China Tel: 86-571-86581786 Fax: 86-571-86581786 Date (07/16/2020) Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 Modular Approval Request FCC ID: 2ANDL-VWRK4 The following attestation addresses the requirements to support modular approval: Modular approval requirement Yes (provide brief statement) No * (a) The radio elements must have the radio frequency circuitry shielded. Physical components and tuning capacitor(s) may be located external to the shield, but must be on the module assembly The module has a metal shied. Refer to the external photo of EUT. (b) The module must have buffered modulation/data inputs to ensure that the device will comply with Part 15 requirements with any type of input signal Data to the modulation circuit is buffered as described in the operational description provided with the application. (c) The module must contain power supply regulation on the module The module contains its own power supply regulation. Please refer to schematic filed with this application. (d) The module must contain a permanently attached antenna, or The module connects to its antenna using an IPEX Company: Hangzhou Tuya Information Technology Co.,Ltd Address: Room701,Building3,More Center,No.87 GuDun Road, Hangzhou,Zhejiang, China Tel: 86-571-86581786 Fax: 86-571-86581786 contain a unique antenna connector, and be marketed and operated only with specific antenna(s), per Sections 15.203, 15.204(b), 15.204(c), 15.212(a), 2.929(b) connector which is considered a standard connector. Factory will use the permanent, industrial epoxy, “Loctite” or solder to make the connection permanent before shipping (e) The module must demonstrate compliance in a stand-alone configuration The module was tested stand- alone as shown in test setup photographs filed with this application. (f) The module must be labelled with its permanently affixed FCC ID label, or use an electronic display (See KDB Publication 784748 about labelling requirements) The FCC ID is printed on the label of the module. Refer to the label of EUT. (g) The module must comply with all specific rules applicable to the transmitter. The grantee must provide comprehensive instructions to explain compliance requirements The module comply with all specific rules.Refer to the datasheet. Modular approval requirement Yes (provide brief statement) No * (h) The module must comply with RF exposure requirements Please refer exhibition RF Exposure for the compliance of MPE RF exposure rule. * Please provide a detailed explanation if the answer is “No.” Yours sincerely, Name: Title: General Manager

Company: Hangzhou Tuya Information Technology Co.,Ltd Address: Room701,Building3,More Center,No.87 GuDun Road, Hangzhou,Zhejiang, China Tel: 86-571-86581786 Fax: 86-571-86581786 WIFI Channel 12 ,13 and 14 Declaration Letter We declare the equipment identified below with regards to Channel 12,13 and 14 capabilities for FCC ID: 2ANDL-VWRK4 Declaration Product hardware does not have the capability to operate on Channel 12,13 and 14. Product hardware has the capability to operate on Channel 12 ,13 and 14. However, these three channels will be disabled via software and will not be accessible to user. Product hardware has the capability to operate on Channel 12 ,13 and 14. However, all the operated channels can’t be changed in the RF parameter via software. All channels have complied with all of the requirements sets out in FCC Part 15.247. Product hardware has the capability to operate on WiFi Channel 12 ,13 and 14, and meets the requirements of KDB 594280 D01 v02r01. Please note: 1.) By default, this device operates in a mode that is compliant with the U.S. requirements. 2.) This device will also use supplemental information such as geo-location data to determine that it is operating outside the U.S., if necessary, to change its power. Such supplemental data will be derived from the following: Global Navigation Satellite System (GNSS)7 sensors in the device Mobile Country Code (MCC),8 or MCC with a Mobile Network code (MNC), received from a CMRS9 carrier and received directly by a receiver on the device Country information derived from multiple adjacent access points (for example using IEEE Std 802.11d provisions) may be permitted on case-by-case basis Other suitable geo-location data based on IP addresses or other reliable source. Name / Title: / General Manager Signature: Phone: 86-571-86581786 Email: [email protected] Date: July 16,2020

External Photos Documentation Manufacturer: Hangzhou Tuya Information Technology Co.,Ltd Page 1 of 2 Product: Smart Audio Module FCC ID: 2ANDL-VWRK4 Antenna External Photos Documentation Manufacturer: Hangzhou Tuya Information Technology Co.,Ltd Page 2 of 2 Product: Smart Audio Module FCC ID: 2ANDL-VWRK4

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Internal Photos Documentation Manufacturer: Hangzhou Tuya Information Technology Co.,Ltd Page 1 of 1 Product: Smart Audio Module FCC ID: 2ANDL- VWRK4

Report No: 708882003254-00A EMC_SHA_F_R_02.06E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 1 of 3 Rev. 20.00 MPE Calculation Applicant: Hangzhou Tuya Information Technology Co.,Ltd Address: Room701,Building3,More Center,No.87 GuDun Road,Hangzhou,Zhejiang China Product: Smart Audio Module FCC ID: 2ANDL-VWRK4 Model No.: VWRK4 Reference RF report # 708882003254-00; 708882003265-00; 708882003266-00 According to subpart 15.247(i)and subpart §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. Limits for Maximum Permissible Exposure (MPE) (§1.1310, §2.1091) (B) Limits for General Population/Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (V/m) Magnetic Field Strength (A/m) Power Density (mW/cm 2 ) Averaging Time (minutes) 0.3–1.34 614 1.63 *(100) 30 1.34–30 824/f 2.19/f *(180/f²) 30 30–300 27.5 0.073 0.2 30 300–1,500 / / f/1500 30 1,500–100,000 / / 1.0 30 f = frequency in MHz; * = Plane-wave equivalent power density; According to §1.1310 and §2.1091 RF exposure is calculated. Calculated Formulary: Predication of MPE limit at a given distance S = PG/4πR² = power density (in appropriate units, e.g. mW/cm 2 ); P = power input to the antenna (in appropriate units, e.g., mW); G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain factor, is normally numeric gain; R = distance to the center of radiation of the antenna (appropriate units, e.g., cm); Report No: 708882003254-00A EMC_SHA_F_R_02.06E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 2 of 3 Rev. 20.00 Calculated Data: FPC antenna for Wi-Fi Maximum peak output power at antenna input terminal (dBm): 23.96 Maximum peak output power at antenna input terminal (mW): 248.89 Prediction distance (cm): 20 Antenna Gain, typical (dBi): 2.5 Maximum Antenna Gain (numeric): 1.78 The worst case is power density at predication frequency at 20 cm (mW/cm 2 ): 0.088 MPE limit for general population exposure at prediction frequency (mW/cm 2 ): 1.0 The max power density 0.088 (mW/cm2) < 1 (mW/cm2) Result: Compliant Calculated Data: FPC antenna for BLE Maximum peak output power at antenna input terminal (dBm): 9.26 Maximum peak output power at antenna input terminal (mW): 8.43 Prediction distance (cm): 20 Antenna Gain, typical (dBi): 2.5 Maximum Antenna Gain (numeric): 1.78 The worst case is power density at predication frequency at 20 cm (mW/cm 2 ): 0.0029 MPE limit for general population exposure at prediction frequency (mW/cm 2 ): 1.0 The max power density 0.0029 (mW/cm 2 ) < 1 (mW/cm 2 ) Result: Compliant Report No: 708882003254-00A EMC_SHA_F_R_02.06E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 3 of 3 Rev. 20.00 Calculated Data: FPC antenna for Classical Bluetooth Maximum peak output power at antenna input terminal (dBm): 8.24 Maximum peak output power at antenna input terminal (mW): 6.67 Prediction distance (cm): 20 Antenna Gain, typical (dBi): 2.5 Maximum Antenna Gain (numeric): 1.78 The worst case is power density at predication frequency at 20 cm (mW/cm 2 ): 0.0023 MPE limit for general population exposure at prediction frequency (mW/cm 2 ): 1.0 The max power density 0.0023 (mW/cm 2 ) < 1 (mW/cm 2 ) Result: Compliant - TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch Reviewed by: Prepared by: Tested by: _____________________ _____________________ ______________________ Hui TONG Jiaxi XU Wenqiang LU EMC Section Manager EMC Project Engineer EMC Test Engineer Date: 2020-07-16 Date: 2020-07-16 Date: 2020-07-16

Report Number: 708882003266-00 EMC_SHA_F_R_02.04E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 1 of 55 Rev. 20.00 FCC - TEST REPORT Report Number : 708882003266-00 Date of Issue: July 10, 2020 Model : VWRK4 Product Type : Smart Audio Module Applicant : Hangzhou Tuya Information Technology Co.,Ltd Address : Room701,Building3,More Center,No.87 GuDun Road,Hangzhou,Zhejiang China Production Facility : Newtronics Hangzhou Co.,Ltd Address : No.15,Jiu zhou Road,Jiang Gan Science&Technology Economic Park Hangzhou Test Result : ◼ Positive  Negative Total pages including Appendices : 55 TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch is a subcontractor to TÜV SÜD Product Service GmbH according to the principles outlined in ISO 17025. TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch reports apply only to the specific samples tested under stated test conditions. Construction of the actual test samples has been documented. It is the manufacturer's responsibility to assure that additional production units of this model are manufactured with identical electrical and mechanical components. The manufacturer/importer is responsible to the Competent Authorities in Europe for any modifications made to the production units which result in non-compliance to the relevant regulations. TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch shall have no liability for any deductions, inferences or generalizations drawn by the client or others from TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch issued reports. This report is the confidential property of the client. As a mutual protection to our clients, the public and ourselves, extracts from the test report shall not be reproduced except in full without our written approval. Report Number: 708882003266-00 EMC_SHA_F_R_02.04E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 2 of 55 Rev. 20.00 1 Table of Contents 1 Table of Contents .................................................................................................................. 2 2 Details about the Test Laboratory ......................................................................................... 3 3 Description of the Equipment under Test .............................................................................. 4 4 Summary of Test Standards .................................................................................................. 5 5 Summary of Test Results ...................................................................................................... 6 6 General Remarks .................................................................................................................. 7 7 Test Setups ........................................................................................................................... 8 8 Systems test configuration .................................................................................................. 11 9 Technical Requirement ....................................................................................................... 12 9.1 Conducted Emission ..................................................................................................... 12 9.2 Conducted peak output power ...................................................................................... 15 9.3 6dB bandwidth and 99% Occupied Bandwidth ............................................................. 16 9.4 Power spectral density .................................................................................................. 21 9.5 Spurious RF conducted emissions ............................................................................... 26 9.6 Band edge .................................................................................................................... 39 9.7 Spurious radiated emissions for transmitter .................................................................. 44 10 Test Equipment List ......................................................................................................... 52 11 System Measurement Uncertainty ................................................................................... 53 12 Photographs of Test Set-ups ........................................................................................... 54 13 Photographs of EUT ........................................................................................................ 55 Report Number: 708882003266-00 EMC_SHA_F_R_02.04E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 3 of 55 Rev. 20.00 2 Details about the Test Laboratory Details about the Test Laboratory Test Site 1 Company name: TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch No.16 Lane, 1951 Du Hui Road, Shanghai 201108, P.R. China Test Firm Registration Number: 820234 Telephone: +86 21 6141 0123 Fax: +86 21 6140 8600 Report Number: 708882003266-00 EMC_SHA_F_R_02.04E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 4 of 55 Rev. 20.00 3 Description of the Equipment under Test Description of the Equipment Under Test Product: Smart Audio Module Model no.: VWRK4 FCC ID: 2ANDL- VWRK4 Options and accessories: NA Rating: 4.2V-5.5V RF Transmission Frequency: For 802.11b/g/n-HT20: 2412~2462 MHz (WiFi) For 802.11n-HT40: 2422~2452 MHz (WiFi) For 802.15.1:2402~2480 MHz (Classical Bluetooth +BLE4.2) No. of Operated Channel: 2.4GHz WIFI: 11 for 802.11b/802.11g/802.11(H20) 7 for 802.11n(…

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Report Number: 708882003254-00 EMC_SHA_F_R_02.05E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 1 of 35 Rev. 20.00 FCC - TEST REPORT Report Number : 708882003254-00 Date of Issue: July 10, 2020 Model : VWRK4 Product Type : Smart Audio Module Applicant : Hangzhou Tuya Information Technology Co.,Ltd Address : Room701,Building3,More Center,No.87 GuDun Road,Hangzhou,Zhejiang China Production Facility : Newtronics Hangzhou Co.,Ltd Address : No.15,Jiu zhou Road,Jiang Gan Science&Technology Economic Park Hangzhou Test Result : ◼ Positive  Negative Total pages including Appendices : 35 TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch is a subcontractor to TÜV SÜD Product Service GmbH according to the principles outlined in ISO 17025. TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch reports apply only to the specific samples tested under stated test conditions. Construction of the actual test samples has been documented. It is the manufacturer's responsibility to assure that additional production units of this model are manufactured with identical electrical and mechanical components. The manufacturer/importer is responsible to the Competent Authorities in Europe for any modifications made to the production units which result in non-compliance to the relevant regulations. TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch shall have no liability for any deductions, inferences or generalizations drawn by the client or others from TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch issued reports. This report is the confidential property of the client. As a mutual protection to our clients, the public and ourselves, extracts from the test report shall not be reproduced except in full without our written approval. Report Number: 708882003254-00 EMC_SHA_F_R_02.05E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 2 of 35 Rev. 20.00 1 Table of Contents 1 Table of Contents .............................................................................................................................. 2 2 Details about the Test Laboratory ..................................................................................................... 3 3 Description of the Equipment under Test .......................................................................................... 4 4 Summary of Test Standards .............................................................................................................. 5 5 Summary of Test Results .................................................................................................................. 6 6 General Remarks .............................................................................................................................. 7 7 Test Setups ....................................................................................................................................... 8 8 Systems test configuration .............................................................................................................. 11 9 Technical Requirement ................................................................................................................... 12 9.1 Conducted Emission ................................................................................................................ 12 9.2 Conducted peak output power ................................................................................................. 15 9.3 6dB bandwidth ......................................................................................................................... 17 9.4 Power spectral density ............................................................................................................. 19 9.5 Spurious RF conducted emissions ........................................................................................... 21 9.6 Band edge ............................................................................................................................... 25 9.7 Spurious radiated emissions for transmitter ............................................................................. 27 10 Test Equipment List ..................................................................................................................... 32 11 System Measurement Uncertainty ............................................................................................... 33 12 Photographs of Test Set-ups ....................................................................................................... 34 13 Photographs of EUT .................................................................................................................... 35 Report Number: 708882003254-00 EMC_SHA_F_R_02.05E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 3 of 35 Rev. 20.00 2 Details about the Test Laboratory Details about the Test Laboratory Test Site 1 Company name: TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch No.16 Lane, 1951 Du Hui Road, Shanghai 201108, P.R. China Test Firm Registration Number: 820234 Telephone: +86 21 6141 0123 Fax: +86 21 6140 8600 Report Number: 708882003254-00 EMC_SHA_F_R_02.05E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 4 of 35 Rev. 20.00 3 Description of the Equipment under Test Product: Smart Audio Module Model no.: VWRK4 FCC ID: 2ANDL- VWRK4 Options and accessories: NA Rating: 4.2V-5.5V RF Transmission Frequency: For 802.11…

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Manufacturer: Hangzhou Tuya Information Technology Co.,Ltd Product: Smart Audio Module FCC ID: 2ANDL-VWRK4 ©2020 Not to be reproduced, except in its entirety, Page 1 of 3 without the Permission of TÜ V SÜ D Certification and Testing (China) Co., Ltd. Shanghai Branch PHOTOGRAPHS OF TEST SET UP Field Strength and Harmonics Test Setup Radiated Emission Setup 9kHz ~ 30MHz 30MHz ~ 1GHz Manufacturer: Hangzhou Tuya Information Technology Co.,Ltd Product: Smart Audio Module FCC ID: 2ANDL-VWRK4 ©2020 Not to be reproduced, except in its entirety, Page 2 of 3 without the Permission of TÜ V SÜ D Certification and Testing (China) Co., Ltd. Shanghai Branch 1GHz ~ 18GHz 18GHz ~ 25GHz Manufacturer: Hangzhou Tuya Information Technology Co.,Ltd Product: Smart Audio Module FCC ID: 2ANDL-VWRK4 ©2020 Not to be reproduced, except in its entirety, Page 3 of 3 without the Permission of TÜ V SÜ D Certification and Testing (China) Co., Ltd. Shanghai Branch Conducted emission Test Setup