Cut loose from your headphones and portable speakers and play your iPod through any FM radio with the Maxell digital FM transmitter. This device requires no batteries or power supply just plug it right into your 3G or 4G iPod and listen to your favorite iTunes through your home stereo, car stereo or any other FM radio. Scan FM stations for the clearest signal then lock in up to ten of your favorite stations with the memory button. Features: 10 channel memory No power swtich or batteries required Scan FM stations for clearest signal Frequency Range: 88.1MHz to 107.9MHz Maximum receivable range 19.5 feet Less than 0.5 percent signal distortion High stability crystal oscillator Phase-locked loop control Frequency response: 20Hz to 20KHz For iPods with dock connectors