This device can modulate the audio frequency signal of iPod, MP3/MP4 Players, CD/VCD/DVD Players, cassette players, game consoles, PC and Laptop computers, to FM signal. With this device, now you can use your MP3 or CD player to listen to you favorite songs through any FM stereo receivers in your car or home quickly and easily. It allows you to share the full stereo music and share the fun beyond your headphones.