DHMXDC In-Car Speakerphone blue tooth version V4.1+EDR Connect any Bluetooth device To Speakers And Home Entertainment Systems wirelessly Makes any stereo a Bluetooth sound system capable of wirelessly playing music from your mobile, iPhone, PC, MP3 player Two mobile phone Bluetooth connection at the same time Voice Control activates your Android or Siri voice engine; control Tour with your voice including Answer/Ignore, Pair New Device, Battery and Phone Command voice commands Built-in motion sensor for Auto On and Auto Off, when device is not in use to save battery lifee without the bound of wire. In-car charger with additional USB cable so you can charge on-the-go; Up to 20 hours of talk time and 60 days standby time