ZF-169 PLUS 3 In 1 Car USB Bluetooth 5.0 Audio Adapter 1. Bluetooth version: 5.0 2. Technology: BT5.0, A2DP, AVRCP (Receiver mode only) 3. Operating range: 10 meters 33 feet (under no obstacle) 4. Pairing name (receiving method): ZF-169 5. Transmitter mode: red LED light on 6. Receiver mode: blue LED light on 7. Dimensions: 32x7x8.5mm 8. Weight: 6 grams describe: 1. It can be used as a Bluetooth audio transmitter to wirelessly transmit the sound of audio sources such as TV to Bluetooth headsets or Bluetooth speakers (in computers and Android systems, it supports direct audio transmission via USB, no need to insert a 3.5mm audio cable) 2. Can be used as a Bluetooth audio receiver, instantly turning a wired speaker into a Bluetooth speaker, allowing you to get rid of the shackles of cables and enjoy wireless music 3. Two devices cannot be connected, only one device can be connected 4. In the computer startup mode, the system cannot adjust the volume or mute. It can only be adjusted on the computer player, web page or Bluetooth headset and Bluetooth speaker. 5. Small in size, yet powerful in wireless audio streaming 6. Put this transmitterreceiver in a backpack or laptop bag and carry it with you without any hassle 7. Wide compatibility, with the included 3.5mm cable, this transmitterreceiver adapter can be widely used in your computer, laptop, home stereo, headphones, smartphone, MP3 player, CD player Wait 8. Transmitter Mode (TX): Wirelessly stream audio from a non-Bluetooth TV, home stereo or CD player to Bluetooth headphones or speakers 9. PC audio transfer mode: wirelessly transfer audio from PC to bluetooth headphones or speakers via USB port, no audio cable required 10. Receiver Mode (RX): Wirelessly stream audio from a Bluetooth-enabled phone, tablet, or computer to a wired stereo, speakers, or headphones Pairing method: 1. TX mode: TX mode will automatically search for other bluetooth receiving devices (such as bluetooth earphones, bluetoo