Car Bluetooth Adapter Receiver Wireless Music 3.5mm AUX Jack Audio Receptor USB Mini Bluetooth for Auto Speaker Stereo xNote: Please ensure your car comes with 3.5mmAUX hole, the device should connect to car AUX hole and then work. Instructions for use: xPower connection: Plug the Bluetooth audio receiver and USB head into the DC 5V power supply. Such as: 5V power adapter, the USB port on the speaker is powered, the power indicator will light up (this current can only be started if it needs more than 100MA). xAudio cable connection: Connect one end of the audio 3.5 connector to the AUX port of the audio device, where the audio cable is connected to better ensure that the music will not be distorted and delayed during transmission. xPairing: Turn on the Bluetooth function on the phone, search for "'""'"Bluetooth"'""'", click and connect. xMusic Play: Open the music APP on your mobile phone, select and play your favorite songs, the receiver receives the signal via Bluetooth, and the your speaker which connected with the receiver will play the songs of your phone. Parameters: Working voltage: DC5V 0.5V Large working power: 0.3W Transmission distance: 10m Bluetooth version: V4.2 Sound channel: vertical channel Working frequency: 2.4GHZ Cable Lenght: 24CM Package included: 1x mini Wireless bluetooth receiver (No retail package )