Maedhawk Bluetooth V5.3 Receiver Car Aux Adapter 3.5mm Jack Use this car adapter to give your old audio device new vitality!Add Bluetooth to your car - The aux Bluetooth adapter is designed to convert your audio system or speakers into Bluetooth compatible handsfree devices. Operation guide Connect the audio port with 3.5 mm AUX plug.Connect the power port with USB plug.Open the Bluetooth in the mobile phone, find the device name "MaedHawk BT500", and click to pair. The pairing is flashing red and blue alternately (faster); When the device is successfully connected to Bluetooth, the blue light will flicker slowly during operation.You can enjoy music wirelessly.