Main features: 1) Wireless headset, support all the cellphones with bluetooth technology 2) With volume control button. Dialing,redialing, receiving,refusing and ending calls fuction 3) The ear hook can be adjusted either for right or left ear 4) noise-canceling microphone to get great sound. 5) Graceful and fashionable appearance. Folding design. Smart model portable 6) LED Indicator, USB charge port 7) Built with lithium battery, Compatible with： *Alkalescent battery of AAA (1.5V/900MAH) *Rechargeable battery of NI-MH (1.2V/900MAH); USB charger Product specification: 1) Bluetooth Specification V1.2(compatible with bluetooth 1.1). 2) Talk time up to six hours 3) Standby time up to 150 hours 4) Broadcasting range of 10m(33inches) 5) Weight:about 18g. 6) Chipset:CSR