New 5.0 Bluetooth audio receiver transmitter three in one USB adapter TV computer car SY319

Product specifications:
Model: SY319
Bluetooth version: 5.0+EDR
Operating range: up to 10 meters/33 feet (without obstacles)
Emitter mode: The red LED light is on
Receiver mode: Blue LED light on
Mode switching: Click the button
Product size: 45 * 20 * 9.5mm
Net weight of product: 5g
Product gross weight: 15g
Packaging accessories:
1 * 5.0 Bluetooth receiving transmitter
1 * AUX audio cable
1 * Chinese and English manuals
Matching steps:
This product is plug and play and does not require a driver
A: Launch Mode - Red Light
1. Insert this device into the USB port for power supply, switch to transmission mode, the red light flashes, and enter the automatic search for Bluetooth device status (such as Bluetooth adapter, Bluetooth earphones, Bluetooth speakers), etc;
2. Insert one end of the 3.5MM audio cable into the AUX interface of the adapter, and the other end into the audio output port of devices such as TVs, projectors, tablets, MP3 players, CD players, or RCA audio signal output port of TVs;
3. Turn on the Bluetooth device and set it to pairing mode. Pairing is successful and the red light remains on.
Note:
① Plug and play computer, driver free, no need for connection (only audio cannot transmit data). If there is no sound, please set the sound to sound card output in the sound settings.
② Different Bluetooth devices (such as Bluetooth earphones) may have slightly different search connection times due to differences in usage schemes and protocols, which is a normal situation.
③ If pairing fails or cannot be connected for a long time, you can shut down all devices and restart to pair again.
B: Receiving mode - blue light
1. Insert this device into the USB port for power supply, switch to the receiving mode, and the blue light will flash to enter wireless receiving mode (when the computer is powered on, first plug the cable into the product, and then plug the product into the computer);
2. Insert one end of the 3.5MM audio cable into the AUX adapter port and the other end into the audio input port of the playback device (such as headphones, speakers, cars, etc.), or plug the 3.5MM audio cable from other playback devices into the audio port of this device.
3. Turn on the Bluetooth function of your phone or tablet, automatically search for Bluetooth devices, select "RT-09" in the Bluetooth list, and click to pair. After successful pairing, the blue light will remain on.
Note:
① You can also directly plug the device into the USB flash drive interface of the player to achieve Bluetooth functionality.
② When there is no sound after a successful connection, please delete the devices that have been successfully paired, as there may be Bluetooth device conflicts.