General Spec Screen no screen FM Frequency 87.5 MHz to 108.0 MHz. Function enjoy the music of your phone through car stereo as well as make hands-free calls while driving Microphone built-in MIC Compatibility any mobile phone with 3.5mm jack, Apple iPhone and iPod series Input Voltage DC 12-24V Output Voltage DC 5V/500mA Others 1*USB charging cable, 1*car cigarette charger Features Clip-on design makes it more convenient to clip it on you. 206 selectable channels (from 87.5 MHz to 108.0 MHz). Enjoy the music of your phone through car stereo as well as make hands-free calls while driving. Surrounded by music and laugh, give you a pleasnt and relaxing journey by car.