Function: 1. Specially designed for car audio MP5, MP3, plug and play, simple and convenient. 2. Select AUX on the radio and then you can play music on your phone in the car. 3. Match your mobile phone or tablet with the Bluetooth module, then select Aux on the radio and then you can use your mobile phone to play music through the car speakers. 4. You can listen to music from mobile phones, tablets, mp3 (must have Bluetooth capability). 5. High-quality ABS material, durable, wear-resistant, with a long service life, small and lightweight, easy to carry. Specification: Condition: 100% Brand New Item Type: Bluetooth AUX Receiver Module Material: ABS Colour: black. Installation Method: 1. Connect the red wire to the 12 volt ignition power supply. 2. Connect the black wire to the ground / metal chassis. 3. Connect RCA to the RCA input of the source device. 4. Go to the phone and sync. Package List: 1 x Bluetooth AUX Receiver Module