General Spec Screen blue LCD backlight display FM Frequency 87.5 to 108.0MHz Function ideal for charging for your iPod. Compatibility iPod iPhone   Features The easiest way to broadcast your music while charging your iPod MP3 player. Compact and stylish design. Transmits stereo quality sound from your portable music player to your car FM radio. All frequency tuning allows endless selection of radio frequencies from 87.5 to 108.0MHz with an increment of 0.1 mhz. Just tune your car radio into any unused FM channel. Then adjust the FM Transmitter to the same radio frequency. Plug FM Transmitter's into ipod port and then it's done. Powered by vehicle cigarette lighter adapter. LCD shows chanel, 200 channels available (87.5 to 108.0MHz). Directly select next/last song and adjust the volume by pressing key on the unit.