aux interface ipod aux in supported CD quality sound,no FM noise charge ipod/iphone automatically while connected easy use aux ... or steering wheel or ipod faceplateAutomatic pause when switching to FM,AM,CD or TAPE/MDCharge ipod/iphone while connected(5v)optional ... 2nd generations) iPhone 1st generation ,iPhone 3G ,iPhone 3Gs ,iPhone 4 Can Work on: V.W, Audi, Skoda, Seat, BMW, Toyota ...