Scosche FMDOC Docking FM Transmitter for iPod and iPhone tuneFREQ Technology Finds the Best Transmitting Frequency Hands free Phone Calls and Plays Through your Car Speakers Charge and Play your iPod or iPhone through any Car Stereo or USB Port for Charging Additional USB Powered Devices AUX/MP3 Input Allows you to Connect any Audio Player Over 100 Digital Channel Selection Ensures Optimal Signal Clarity Flex-neck and Rotating Head for Multiple Viewing Angles Flexible Arms Securely Hold your iPod or iPhone