Nice little gadget,
This review is from: TeckNet® MT-096 Apple FM Transmitter For Apple iPhone 3G, iPhone 3GS, iPhone 4G, iPhone 4GS and other iPod Players (Electronics)
This is used on the school run by various children. It works well for them. Even from the back of the people carrier. Works find with 4G Nano and 2nd and 3rd gen touch. The charger lead works just fine too.