From the Manufacturer:

Share and Enjoy Your Portable Tunes on the Road

Enjoy your MP3 player, CD player, portable DVD player or even your laptop audio through you car stereo's FM radio or virtually any FM station*-with Monster RadioPlay 300 Wireless FM Transmitter. It's a fast, simple way to take all your favorite music playlists with you on the road, eliminating those piles of CDs that might be rattling around in your glovebox.

Full FM Tuning Capability Means Great Sound Just About Anywhere

Monster RadioPlay 300 tunes in to just about any FM station so you can get clear wireless transmission to your car's FM radio just about anywhere. It also features three programmable "favorite station" preset buttons and an easy-to-read, dimmable LED display so you can easily tune and select your favorite station presets in your car, day or night.

Monster RadioPlay 300-The Fast, Easy Way to Take Your Tunes for a Spin

Just tune your car radio to any clear FM station, tune RadioPlay 300 to the same station, hit play on your portable player and you're ready to roll. Program the 3 presets so you can change to the clearest station while you drive-it's that easy!

* Excluding 87.7MHz and 87.9MHz

Not Compatible with: Apple iPhone