* OLED *Incoming call display * Can be used 10 meters away from a Bluetooth mobile phone that it is Bluetooth wirelessly connected to. * It provides a talking time up to 4 hours and stand-by time up to 160 hours.? * Can be connected with any Bluetooth computers, Bluetooth PDA and Bluetooth,mobile phones. Version: 1.2 OLED indicator Display incoming call, battery power, charging status Frequency: 2.4-2.48GHz Operation range: 10m (30ft) Talking time: Up to 4 hours Standby time: Up to 160 hours Charging time: 2-2.5 hours Product size.: 74.5 x 17.5 x 13.2mm Battery: Rechargeable Lithium Polymer Support profiles: Handsfree and headset Security: pairing, Encryption, Authentication