l Bluetooth standard V1.2 version. Bandwidth: 2Mbps. l Wireless frequency range: 2.4GHz ISM worldwide. l Working range: 10M l Plug: USB. l Rechargeable Li-polymer battery. l Standby time: 270 hours. l Talking time: 5 hours. l Weight 14.5g. l 180 angles hook. it can be wore either ear, meet local customs.. l High quality imported material. It has slick appearance, no burr feeling. l USB charging assures the convenience of charging headset. So there is no need to take heavy charger. l 16 grade adjustable volume control. Clear sound quality. Anti-noise technology. Ensure the talking quality. l Perfect compatibility with all Bluetooth mobile phones.