Fingertip Play/ Pause/ Forward/ Baclward controls Play on any car stereo: Play over your FM (FM: 88.1-107.9 M Hz) radio or connect through stereo AUX-INControl i Trip FM Transmitter with your Multi-Touch display DC output 5v@1 A Engine-noise reductiom circuit for cleaner-sounding audio. Free App for iPhone & iPad touch. Smart scan Not compatible for iPod nano.