Features: 1.Functions: With multi uses, can be used as Bluetooth receiver, vehicle music receiver, AUX Bluetooth receiver, audio adapter. 2.Wide Compatibility: Bluetooth audio adapter supports connection of earphones, mobile phones, speakers and cars stereos. 3.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. 4.Stable Transmission: Aux bluetooth adapter has better sound quality, no interference in transmission, with lower power consumption. 5.Premium Material: Bluetooth music adapter is made of durable ABS plastic material, impact resistant, high strength, not easy to crack. Specification: Item Type: Bluetooth Receiver Material: ABS Color: Black Functions: Bluetooth handsfree call function Frequency: 2.4GHz Socket: 3.5mm stereo input socket Power Supply: Charging with mini USB cable (built in battery)