Bluetooth Adapter for Car Aux 3.5mm Jack Handsfree

How to use: 1.power on/off power on: press and hold the on/off button for 5-7 seconds until you hear a "ready for connecting or a sound", it will auto connect the phone which was paired. power off: press and hold the on/off button for 4-5 seconds until you hear a "long be or red led". 2.connect the receiver to your speakers with 3.5mm male to male audio connector or 3.5mm male to male audio cable to connect the speakers and the receiver (if no sound, please make sure it was inserted completely).