Wireless transmit phone call from Bluetooth mobile phone to the car FM stereo system. While using Google Map, you can hear the voice prompt from the background despite the fact that you are making a call or listening to music. Built-in FM transmitter, full frequency: With built-in microphone and automatically calling-number systemSupports USB disk and SD cardWith 3.5mm line-in jack, support external audio devices.Switch to Hands-free mode automatically from music playing status when receiving call This wireless 3in1 car Charger comes with an MP3 FM modulator, has a space for memory card, a USB space, can be used to control radio volume and a space for flash drive. Very Stable, doesn't go off while you enter pothole.
It is a safe driving situation to charge the phone You can charge your two phones at a go.