Bluetooth IC: CSR 2.1Frequency: 87.5-108.0 MHZUSB Input: 12-24VUSB Output: 5V/1AMusic Format: MP3/WMA FormatUSB (Maximum support): 32GBTransmitting Distance: >10MColor:BlackFeature: Wirelessly transmit phone call from Bluetooth mobile phone to the car FM stereo system.With built-in microphoneBuilt-in FM transmitter， full frequency: 87.5-108MHZSupports USB disk