Features: 1) Connects portable music players to your car or home stereo quickly and easily using FM radio waves 2) Just plug the transmitter into the headphone jack of your iPod, PDA, MP3, CD, or cassette player; or connect it to your PC or laptop computer 3) Tune your car stereo or receiver to any clear FM frequency, and enjoy your iPod music experience with more sound and fewer wires Specifications: 1) Four frequencies digital frequency range: (87.7, 88.1, 88.5, 88.9) or (106.7, 107.1, 107.5, 107.9) MHz 2) Max. receiving range: 3m 3) Batteries 2pcs Packing: 1pcs/clamshell 50pcs/ctn Carton dimensions: 58 x 58 x 25cm Weight: 1.3kg