TuneBase FM w/Handsfree. Listen to your iPod or iPhone music and talk hands-free through your car stereo system. TuneBase FM connects through your FM radio receiver with no special installation or wiring so you get stereo sound for your playlist and your calls. TuneBase FM transmits your music and calls over the strongest FM frequency available. ClearScan technology lets you find the clearest signal at the push of a button. Adjust your stereo to the station and TuneBase FM does the rest. The easy-to-read display lets you see which station you?re using.