Addnew's BTH002 Bluetooth Mono Headset has stylish design and best quality mould and finishing. It is very small and light. It is also an affordable handsfree solution that delivers the high quality that you expect. Perfect for anyone on the go!Features:Crystal clear sound with advanced echo and noise cancellation technologystylish clip-on design, left & right ears, chest wearable Automatically connect to last paired Bluetooth deviceBluetooth profiles: Headset, Hands freeSupport voice dialing and last call number redialSpecification:Bluetooth specification: V2.0+EDR Bluetooth frequency: ISMD 2.4-2.4835GHzModulation type: GSK Receiver sensitivity: -70dBmAudio resolution: 15 bits Pairing password: "0000"Working current: 20mA RF power: class II (-6dBm - +4dBm)Speaker impedance: 32ohm Transmission rate: MAX 3MBPSCharging time: 2-3hrs Transmission distance: 10m without obstacleWorking time: 2.5hrs Battery: DC3.7V rechargeable lithium polymer (55mAh)Standby time: 80hrs Working temp.: -10 to +45C Storage temp: -20 to +60C