Carpanion Watch Shape Mount Holder Design Car kit Bluetooth FM Transmitter, dual USB, Charging Hands-Free Calling, MP3 music Player AUX Stereo Audio Receiver, With Remote Controller, Color Silver Wireless transmit phone call from Bluetooth mobile phone to the car FM stereo system. Built-in FM transmitter, full frequency: 87.5-108.0MHZ. With built-in microphone and automatically calling-number system. Supports USB disk and SD card,A2DP function. With 3.5mm line-in jack, support external audio devices. Switch to Hands-free mode automatically from music playing status when receiving calls. USB charging port for charging iPod/ iPhone, iPad and other mobile device. (output: DC 5V/2.1A). Support 12-24V voltage from the car cigarette lighter. Strong and elegant watch design with LCD screen display, just support number displaying. Flexible metallic hose adapted for any type of autos. With infrared remote control, easy operation. Compatible with iPhone 6 Plus / 6 / 5S / 5 / 4S / 4, Samsung, LG, Nexus, Nokia, Motorola, Sony, HTC, Android Smart Phones & Bluetooth devices.