1.Improved Call comfort.
2.Supplied with a 3.5mm plug.
3.Pick up / hang up button.
4.Voice +/- button for controlling the volume during the call.
5.Luxurious soft-touch texture.
6.High quality speaker and microphone.
7.Noise reduction system.
8.Eliminate over 99% of absorbed phone radiation.
9.Allows access to phone functions when making calls.
10.Specially designed for iPhone 4/4S.