Monster iCarPlay Wireless 250 FM Transmitter with AutoScan for iPod and iPhone FM Transmitter/Charger-A IP FM-CH 250 Plays iPod or iPhone music over any car stereo systems. AutoScan 3D triple-scans to lock in the clearest possible FM frequency. 3 favorite station programmable presets. Can charge other USB devices: cell phones, cameras, and more. Charges iPod and iPhone while in use: powered by 12V car cigarette lighter adapter.