Product name: Bluetooth audio receiver and transmitter Bluetooth version: 5.3 Product type: 2-in-1 Product color: silver and black Product features: 1. Free switch between receiving and transmitting modes. Transmitting TX + receiving RX two modes are designed in one, and dual signals can be switched freely to meet your usage needs 2. High-definition music. Listen to hands-free calls all the way. Free your hands. The car audio turns into a Bluetooth audio in seconds, and you can listen to mobile music all the way. Built-in microphone, hands-free amplification for clear calls, safer driving without taking your hands off the steering wheel 3. A new experience of wired to wireless music With a 3.5mm audio cable, connect the old audio/amplifier to easily transform into a Bluetooth audio/amplifier 4. Enjoy watching TV series without disturbing your family Install Bluetooth function on the TV, connect Bluetooth headphones to watch TV series at any time without disturbing your family 5. Get rid of the "wire" system and listen to music more freely Computers can also connect to Bluetooth, connect Bluetooth headphones, speakers, etc. to get rid of wire constraints and listen to music more freely 6. Get rid of the "wire" system and listen to music more freely Computers can also connect to Bluetooth, connect Bluetooth headphones, speakers, etc. to get rid of wire constraints and listen to music more freely 7. CD-level sound quality pleases your ears Supports high-fidelity stereo sound quality, clear sound quality, and enjoy the world of music 8. Eye protection light ring refuses blind plugging working status at a glance The product adds a soft red/blue light ring, which is eye-catching and not dazzling, and is more convenient to use at night. 9. The metal frame is so exquisite that you can't put it down. The product frame adopts the oxidation sandblasting process. The full metal shell is exquisite, compact and very textured. Product gross weight: 50g Package includes: Bluetooth audio receiver transmitter*1 Manual*1 Charger*1 Audio adapter*1