Plug and play: Installed via CD changer port, simple and convenient, perfectly matched. Hands-free phone call support (HFP): Support answer/hang up, etc. via car radio buttons and steering wheel buttons. Support A2DP playback: Easily stream music from Bluetooth devices into the factory car stereo system. Bluetooth AVRCP control technology: You can use the car audio host (or steering wheel) to control song selection/previous/next track, pause, skip/rewind. Hi-Fi sound quality: Connected to the car stereo via a wire harness, no interference and loss of sound quality, rivaling CD sound. Name: 12V car bluetooth AUX adapter microphone hands-free + music disc box for Power supply: 12V DC car Voltage input: 11V-14.6V DC Operating current: 600mA Standby current: 20mA Frequency response: 20Hz to 20kHz, + / - 2dB Power: less than equal 5W Distortion: 0.01% Signal to noise ratio: 95dB Operating temperature: -35Celsius-85Celsius Color: Black Material: Plastic Package Contents: 6 x Bluetooth