Anti-radiation Retro Cell Phone Handset for iPhone 4 (red) [5093428] - $22.80 : Apple Store

Features
Improved call comfort.
Allows access to phone functions when making calls.
Eliminates over 99% of absorbed phone radiation.
Turns your tablet computer into a telephone via Skype or VOIP applications.
Supports noise reduction system.
Comes with pick up/ hand up button.
Supplied with a 3.5mm plug.
Luxurious soft touch paint treatment.
Comes with speaker and microphone.
Restore ancient ways the receiver is set for a comfortable and graceful trend of the mobile phone. The receiver voice of Handset is not only high quality, but also feel comfortable in hand.