... .functional key on handset 3.Compatiblel with brands 4.mobile phone handset mobile phone handset1. Radiation Proof with mic,receiver 2. Volume ... Voice 4. Compatible with most of phone- Volume controlSpecificationColors: Blue, Red, purple, yellow, pink, green, orange, black, whiter, pearly whiteOEM&ODM ... Nokia phone,or Blackberry Phone.with volume control button fashion!mobile phone handset