FCC ID: 2AY39WT-04 Bluetooth Audio Transmitter

User manual Bluetooth Audio Transmitter WT-04 Whats inside the box WT-04 Bluetooth Transmitter USB-A to Type-C Right Angle Converter Quick Start Guide About WT-04 Because the USB jack on the TV is almost the input interface, it cant output audio, so this product is unavailable on the TV. If WT-04 can not pair with Bluetooth device, please try to initialize both Bluetooth devices and WT-04, then pair them again. If use it on Android smartphone, please set the output of smartphone to OTG. Not all Android smartphones support OTG output. When you want to pair WT-04 with Bluetooth headset / speaker, please make sure Bluetooth headset /

speaker is not pairing with other Bluetooth transmitter like smartphone / iPad. Display of codec LED indicator When pairing with one Bluetooth device, WT-04 LED indicator display status WT-04 adopts advanced CSR8670 chip with apt-X low latency function. It's no need to install driver and license, plug and play. This device can be plugged into USB port of non-Bluetooth USB digital audio output devices, and pair with Bluetooth headphone and Bluetooth speaker. So this can achieve wireless transmission, in addition, it can be connected to two Bluetooth headphones or Bluetooth speakers simultaneously, allow you to enjoy movie and football matches with your lover and wont disturb your family. Paired device codec WT-04 LED indicator display status SBC Pic 2 APTX Pic 3 LL Pic 4 Corresponding system When pairing with two Bluetooth devices at the same time , WT-04 LED indicator display status The system that can output USB digital audio like Windows / Mac OS / iOS / Android / PS3 / PS4 / PS4 Pro /

Nintendo Switch / USB-A / USB-C (OTG) / Micro-USB (OTG) SBC+SBC SBC+APTX SBC+LL APTX+APTX APTX+LL LL+LL Pairing connection Pair with Bluetooth devices like Bluetooth headphone / speaker etc, please make sure your Bluetooth headset /

speaker is in pairing mode and is disconnected from other Bluetooth transmitting devices like smartphone / iPad. Plug WT-04 into PC, then press the button for 3 seconds until you see the LED indicator of TX is flashing blue rapidly, it will automatically search and pair with one Bluetooth device. When this product has successfully paired with Bluetooth device, the flashing LED indicator turns to solid blue. WT-04 can identify Bluetooth device codec, corresponding codec SBC / APTX / LL will automatically display, the corresponding green LED indicator will be long bright at this time. If you want to pair with the second Bluetooth device, keep connecting with the first one, and press the button for 3 seconds until you see the LED indicator of TX is flashing blue rapidly, it will automatically search and pair with the second Bluetooth device. When WT-04 was pairing with two Bluetooth devices at the same time, for details of the Bluetooth device corresponding codec identification, please refer to Display of codec LED indicator on the right. Pair again with your Bluetooth devices that have been paired, make sure your Bluetooth devices are in pairing mode, and plug WT-04 into PC, the LED indicator of TX flashes slowly, at this time WT-04 will automatically pair with up to two Bluetooth devices that have been paired. When WT-04 was pairing with one Bluetooth device, just make sure the second Bluetooth device that have been paired is in pairing mode, WT-04 will automatically pair with it. Initialization reset Precautions In the power on state, please long press WT-04 button for 10 seconds, and the rapid flashing TX LED indicator will pause temporarily, then immediately continue to flash rapidly. Initialization reset is complete at this time. Pic 3 When pairing with two Bluetooth headsets, only one headset microphone can be used. Please note the codec display of WT-04 when pairing with two Bluetooth devices. Paired device codec WT-04 LED indicator display status Pic 2 Pic 2 Pic 2 Pic 3 Pic 3 Pic 4

"LL" in above and below is an abbreviation for aptx Low Latency. When pairing with one device, based on the device codec, the corresponding green LED indicator will light. When pairing with two devices, based on the lowest codec, the corresponding lowest codec green LED indicator will light, and the codec of transmitting acoustic signal also becomes the lowest codec. For two identical codecs, the corresponding green LED indicator will light. Pic 1 Pic 2 TX (blue LED indicator SBC (green LED indicator TX (blue LED indicator Pic 4 APTX (green LED indicator LL (green LED indicator TX (blue LED indicator TX (blue LED indicator Acoustic setting NOTES ON ENVIROMENTAL PROTECTION After insert WT-04 into the USB jack of Windows PC, its hardware will be recognized automatically by system. If manual setting is necessary, please set [Playback Device] to [REIYIN Bluetooth Audio WT04]. It is necessary to manually set after insert WT-04 into the USB jack of Mac computer. a) Go to [System Preferences], choose [Sound]. b) Choose the [Output] tab, select [REIYIN Bluetooth Audio WT04]. After insert WT-04 into the USB jack of PS4, please set with this route, [Settings] [Devices] [Audio Devices] [Output to Headphones] [All Audio]. Please also mark [Switch Output Device Automatically] on the same screen. For screen detailed of PS4 / PS4 Pro / PS3 setting, please refer to the below Pic 5. Audio Devices Input Device Output Device USB Headset (REIYIN Bluetooth Audio WT04) USB Headset (REIYIN Bluetooth Audio WT04) At the end of its useful life, this product must not be disposed of with regular household waste but must be returned to a collection point for the recycling of electrical and electronic equipment. The symbol on the product, users manual and packaging point this out. The materials can be used in accordance with their markings. Through re-use, recycling of raw materials, or other forms of recycling of old products, you are making an important contribution to the protection of our environment. Your local administrative office can advise you of the responsible waste disposal point. Pic 5 Adjust Microphone Level Warning:

Volume Control (Headphones) Output to Headphones Switch Output Device Automatically All Audio Do not expose this product to water or moisture in case of the risk of fire on electric shock. Do not attempt to modify this product as it could result in personal injury or product failure. Do not place naked flame sources, such as lighted candles, on or near the product. Do not attempt to clean this device with any corrosive liquid. If water or other foreign substances permeate inside the device, product failure may be result. Turn off the Bluetooth device to disconnect with WT-04. Remove WT-04 from the USB jack of personal computer. Turn off the power of the connected USB device. (WT-04 power will not turn off even if some PC are power off) Signal disconnection Specifications Net Weight:

Dimension:

Casing Materials:

Corresponding Codec:

Support Bluetooth Format:

Channels:

Bluetooth Version:

Frequency Response:

Microphone:

Operating Voltage:

Bluetooth Signal Effective Distance:

Operating Temperature:

4.8g 0.7 * 1.63* 0.31 inch Plastic aptx-Low latency / aptx / SBC A2DP / AVRCP 2.0 Bluetooth 5.0 2.402 ~ 2.480GHz Support microphone wireless communication 4.5 ~ 5.5V (Power supply directly from USB / PC / PS4 etc.) Up to 33 feet 0 ~ 45 Reiyin shall not be held liable for any technical or user interface discrepancies in this manual. The Reiyin WT owners manual may be subject to change without prior notice. Check out www.reiyin.com/support for the latest version of the Reiyin WT owners manual. www.reiyin.com A Division of Reiyin Technology Co., Limited All rights reserve. Reiyin and the Reiyin logo are trademarks of Reiyin Technology Co., Limited. No part of this publication may be reproduced, stored or transmitted in any form without the permission of Reiyin Technology Co., Limited. While every effort has been made to ensure the contents are accurate at the time of publication, features and specification may be subject to change without prior notice. If you require service or any technical support, please visit our website at www.reiyin.com/support for assistance or contact us via +86 151 1880 0622 or email us at support@reiyin.com. Made in China 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.

(2) this device must accept any interference received, including interference that may cause undesired operation. FCC Compliance:

(1) 15.19 Labelling requirements. 15.21 Changes or modification warning 15.105 Information to the user. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Note: 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 against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following 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.

FCC ID LABELING AND LOCATION FCC ID Label Bluetooth Audio Transmitter FCC ID: 2AY39WT-04 FCC ID Label Location The label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the user at the time purchase (Labeling requirements per 2.925)

C5266091_X10_Ed.1 Reiyin Technology co.,Limited B04A No.103, Huawei Road, Xiangzhou Dist, Zhuhai, Guangdong, China Date: 2021.02.24 Subject: Request for Confidentiality FCC ID: 2AY39WT-04 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules

(47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits ID Label/Location Attestation Statement External Photos Block Diagram Schematics Test Report Test Setup Photos Users Manual Internal Photos Parts List / Tune Up RF Exposure Info Operational Description Cover Letter(s) SDR Software / Security Info Long-Term Confidentiality No No No Short-Term Confidentiality No No No No No No No No No No No No Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Name: Tim Chen Date: 2021.02.24 Sincerely, Title: Manager Signature of applicant:

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Reiyin Technology co.,Limited Model differences We:

Reiyin Technology co.,Limited Statement that All the modelWT-04, WT-03, WT-HD05, WT-HD06, WT-01are identical except model name.All above models are identical in the same PCB layout, interior structure and electrical circuits. The only difference is model name for commercial purpose. City and Country:

Date:

Name:

Function:

Signature:

(this must be a person)

(or official company stamp) Zhuhai 2021/02/24 Tim Chen Manager

C5266091_X8_Ed.1 Letter of Authorization

<Reiyin Technology co.,Limited >

Company: Reiyin Technology co.,Limited Address:B04A No.103, Huawei Road, Xiangzhou Dist, Zhuhai, Guangdong, China Product Name: Bluetooth Audio Transmitter Model Number: WT-04, WT-03, WT-HD05, WT-HD06, WT-01 FCC Identifier: 2AY39WT-04 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Tim Chen Date: 2021-02-24 Title: Manager Signature of applicant:

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