Free your MP3s with these six FM transmitters

What do you do if you want to listen to your MP3 player in the car but your car stereo doesn't have a tape deck or line input? You certainly don't pop on your headphones (that's illegal), and affixing a set of portable speakers to your dash is a little clunky. Plus, not many get loud enough to provide decent sound over the rumble of your car. Luckily, there's another solution. As long as you have a working FM radio, you can use an FM transmitter to listen to your MP3 player over your car stereo. In fact, a couple of these devices will even work over your home stereo, though this should be done only in a pinch, as FM transmitters generally provide fairly poor sound quality. If you must use one, however, here are a couple of picks for you to compare and contrast. You might want to note that the Belkin TuneBase works only with the iPod Mini and the Monster iCarPlay only with dock-connecting iPods, but the rest of the devices (yes, even the DLO TransPod) work with all MP3 players.