The G2G302C transmitter is a full spectrum FM transitter. It comes with a retractable 3.5mm stereo headphone connector. It has backlit lcd panel and 0.1 Mhz step. Works pretty well with my mp3 player and my car radio even in big metropolitan area with lots of FM channels. The full FM spectrum lets you search a good clean frequency. It also comes with a 12V cigarette lighter power adapter for use in cars. The transmitter connects to this 12V adapter via a female USB port. So you can also connect the transmitter to your computer or wall socket with a male-to-male USB cable and send musci files on...read full review »