Functions: With multi uses, can be used as Bluetooth receiver, vehicle music receiver, Aux Bluetooth receiver, audio adapter. Wide Compatibility: Bluetooth audio adapter supports connection of earphones, mobile phones, speakers and cars stereos. Easy to Use: Plug in the car Aux interface to upgrade the car audio to a Bluetooth car audio. The mobile phone connects to the car Bluetooth audio to listen to music, call and navigate wirelessly. Stable Transmission: Aux bluetooth adapter has better sound quality, no interference in transmission, with lower power consumption. Premium Material: Bluetooth music adapter is made of durable Abs plastic material, impact resistant, high strength, not easy to crack.