Spec.&Feature: -- Volume control -- Long time endurance -- Support all kinds of bluetooth mobile phone -- Weight only 8g -- Warranty: 1 year -- Connect with 2 mobile phones at same time. Answer/reject /redial call. Adjust volume when listen music/choose next or preview song -- Small and lightweight ,New fashionable design. Easy to use, comfortable for talking and music playing Application: -- Mobilphone, Computer, MP3/4, eletronic products with bluetooth