Characteristics: xUniversal, suitable for most vehicles. xBluetooth 2RCA Auxiliary Cable Adapter. x High quality, stable characteristics and high reliability. xYou can listen to music by phone or pad or mp3(must support bluetooth function). xYou can connect this product to your rear radio and connect the red wire to 12V and the black wire to 12V-. x Pair your phone or tablet with the bluetooth module. and select AUX from the radio, then you can use your phone to play music through car speakers. Specification : Product Name: Car Bluetooth Receiver Module. Bluetooth version : 5.0 Effective distance: 10 meters Working voltage: 5-12V material : plastic Colour: black Line Length: 15.4cm Applicable models: suitable for vehicles with 2RCA interface Suitable for 5-12V voltage, the maximum cannot exceed 14V, otherwise the voltage on the device is too high and it will be burnt. 1 x bluetooth receiver module