Bluetooth version: V1.2 Operating Distance: 10 Metres Weight: 17 grams Range of Frequency: 2.4GHz Spectrum Dimension: 58mm X27mm X22 mm Talk time: 8 hours talk-time Standby time: 200 hours Nominal charging time: Within 3 hours Ear compatibility - Adjustable for both left and right ear. Rechargeable Li-ion ploymer battery.