Special for iphone (with the volume buttons) 1) Have an improvement. Comfortable call with it. 2) can make your call when connected with your phone (mobile phone like telephone) 3) eliminate more than 96% radiation of cell phone 4) On the receiver With took/hang up button. 5) provides the 3.5 mm plug (compatible with MAC, iphone, ipad) 6) soft touch lacquer processing 7) high quality speakers and microphone