
TuneBase Direct connects to your newer car stereo's auxiliary input using a 3.5mm cable, and also charges your iPhone so the battery doesn't run out. TuneBase FM goes the old-fashioned FM transmitter route, which usually sounds like crap and is subject to interference in cities with lots of radio stations. It also charges the iPhone, and has a ClearScan feature for finding the clearest FM signal to use for music transmission. TuneBase Direct will be available in the next few weeks for $69.99 including a 3.5mm cable, while TuneBase FM will drop in July for $89.99.