Bluetooth version: V2.1+EDR,Chipset: CSR Bc4 Talk time: Up to 5 ... : Up to 120 SpecificationOperation range: Up to 10 metersBluetooth version: V2.1+EDR,Chipset: CSR Bc4Talk time: Up to 5 hoursStandby ... call, call redialMute, Transfer a call,volume adjustment, Voice-dial V2.1 Bluetooth mono headset