FM Transmitter for iPod / iPad / iPhone 3G / 3GS / 4 / 4S / 5 , MP3 / 4 players, mobile phones with a 3.5mm audio jack Transmit your favorite tunes from your device to your car / other stereo Hands free talk function offer you more safety during driving LCD displays frequency with backlight With Touch key design, High fidelity stereo Digital PLL, transmission is stable in different environments Full frequency range Memory for last frequency Powered by rechargeable built-in lithium battery, do not need to use the iPhone's power Blue LCD backlight display Operating Instrucitons: Connecting this device to the compatible mobile phone or other 3.5mm audio devices. Tune the frequency of the item same as car radio. Play your music and enjoy it via car stereo. Press the answer key of your mobile phone when the phone rings to answer calls,then talk hands-free via built-in high quality microphone and the car stereo.(For optimal voice clarity,distance of 30 to 60cm between the user and the microphone is advised. If distortion or significant noise happens,pls tune down the volume of your phone and tune up the radio.) If the FM signal is interrupted,pls reset the car radio and this devices to another clear frequency. Package Included: 1 X 3.5mm Music Audio FM Transmitter 1 X USB CableUnbranded/Generic