1、Bluetooth 5.0 adapter, transmit/receive 2 in 1, powerful function bluetooth adapter, with built-in bluetooth 5.0 dual system, independent circuit designed, more powerful performance, can transmit and receive bluetooth signal at the same time. 2、Many application scenarios, receiving mode, mobile phone connected to bluetooth speaker, car speaker and other bluetooth devices, startup mode, bluetooth earphone, connected to computer, TV, projector and other bluetooth speakers, through 3.5mm plug connected to the car, easy to listen to the song/call/navigation function. 3、Smart bluetooth 5.0 chip, transmission distance can achieve 15m, signal transmission faster and more stable, lower power consumption listening to music can not jam, restore Hi-Fi sound quality. 4、Using receiving function: 1. Insert the equipment into the USB power port (5V USB interface), the equipment will automatically turn on, the equipment will light up in red and flash quickly, that is, enter the Bluetooth connection state. 2. Plug the 3.5mm audio cable into the 3.5mm audio port on the devices, and then plug the audio cable into the AUX port of the playback equipment(headphones, speakers, etc.) 3. Turn on the Bluetooth function of the mobile phone (or computer), search for peripheral devices, select the equipment named YET-TR9, and then match. After the pairing is successful, the indicator light on the Bluetooth receiver will turn on. 5、Using start function: 1. Plug the equipment into a USB port (such as a USB charging port on a TV, computer, or mobile phone charger), the equipment will automatically turn on, the equipment will light blue and flash quickly, that is, enter the Bluetooth connection state. 2. Insert the 3.5mm audio cable into the 3.5mm audio port on the equipment, and then plug the other end of the audio into the audio output interface of the computer, TV, projector, mobile phone, tablet, mp3, player, etc. 3. Turn on the Bluetooth audio receiving equipment (such as Bluetooth headset, Bluetooth speaker, etc.) to the pairing state, the equipment will automatically pair, and the blue indicator light always lights up, indicating that the pairing is successful.