Plug and play: Installed via CD charger port, simple and fast,perfectly match.Support hands-free phone calling(HFP): supports answer/hang up etc. via car radio ons and steering wheel ons.Support A2DP playback: easily g music of bluetooth devices into factory car stereo system.Bluetooth AVRCP control technology: You can use the car audio host (or steering wheel) to control song selection /prev/,pause,fast forward/backwardHi-Fi sound quality: Connected to car stereo via wire harne, no interference and no lo of sound quality, rivaling CD sound.Name: 12V Car bluetooth AUX Adapter Microphone Handsfree+Music Disc Box For HPower supply: 12V car DCVoltage Input:11V-14.6V DCOperational current: 600mAStandby current: 20mAFrequency response: 20Hz to 20kHz, +/- 2dBPower: le than equal 5WDistortion: 0.01%Signal to noise ratio: 95dBWorking temperature: -35Celsius-85Celsiuscolour:BlackMaterial:plasticPackage Contents:1 x bluetooth connection module1 x Harne for the disc box1 x Microphone1 x ManualOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the ture a little different from the real thing. The measurement allowed error is +/- 1-3cm.