Bluetooth transmission mode (TX) means to convert wired audio into bluetooth-compatible signal and transmit it to the bluetooth-compatible device for output.It can transmit audio at high speed, but cannot transmit data, and it is plug-and-play, without any driver or connection.The bluetooth-compatible receiving mode (RX) refers to receiving bluetooth-compatible signals and transmitting them to wired audio through the bluetooth-compatible connection.Just connect to the 3.5mm audio interface of the TV, and then you can transmit the sound to the headset by Bluetooth, so you are not afraid to disturb your family when you watch a movie at night.With low power consumption and high rate stable signal transmission, you can listen to songs more smoothly.How to Use:Transmitting mode: plug the device into the USB port for power supply, switch to the transmitting mode, the red light flashes, and enter the automatic search for bluetooth-compatible device status (such as bluetooth-compatible adapter, bluetooth-compatible headset, bluetooth-compatible speaker), etc.Insert one end of the 3.5mm audio cable into the audio interface of the adapter, and insert the other end into the audio output hole of TV, projector, tablet, MP3, CD player, etc. or the RCA audio signal output hole of TV.Turn on the bluetooth-compatible device and adjust it to the pairing state, the pairing is successful, and the red light is always on.Receiving mode: plug the device into the USB port for power supply, switch to the receiving mode, the blue light flashes, and enter the wireless receiving state (when the computer is powered, first plug the cable into the product, and then plug the product into the computer).Insert one end of the 3.5mm audio cable into the audio interface of the adapter, and the other end into the audio input interface of the playback device (such as earphones, speakers, cars, etc.), or plug the 3.5 audio cable of other playback devices into the audio port of this device.Turn on the bluetooth-compatible function of the mobile phone or tablet, automatically search for bluetooth-compatible devices, select "RT-09" in the bluetooth-compatible list and click to pair, the blue light will be on after the pairing is successful.Item Name: bluetooth-compatible Transmitter ReceiverMaterial: ABS, Zinc AlloyMode: Transmitting Mode: Red Light on, Receiving Mode: Blue Light onBluetooth Version: 5.0+EDRFeatures: Plug and Play, Portable, Durable, Easy to UseSize: 4.5cm x 2cm x 0.95cm/1.77" x 0.79" x 0.37" (Approx.)Notes:Different bluetooth-compatible devices (such as bluetooth-compatible headsets) have slightly different search connection times due to differences in their schemes and protocols, which is normal.If the pairing fails or cannot be connected for a long time, you can turn off all devices and restart them to pair again.The bluetooth-compatible function can also be realized by plugging the device directly into the USB reading port of the player.When there is no sound when the connection is successful, please delete the successfully paired device, there may be a bluetooth-compatible device conflict.Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x bluetooth-compatible Transmitter Receiver1 x Audio Cable1 x User Manual