i Trip Auto combines Griffin&s renowned FM transmitter technology with an integrated charger that plugs into a car&s cigarette-lighter or accessory socket Setup & operation are quick & easy Press the Smart Scan button & tune the car radio to the frequency i Trip chooses for you It&s that simple (But of course you can also select frequencies manually) Other features include inline remote controls assignable presets stereo & mono play modes & Smart Sound signal adjustment Add app integration for iPhone & iPod touch with Griffin&s i Trip Controller app a free download from the i Tunes App Store