Bluetooth version: V1.2
Operating Distance: 10 Meters
Weight: with only 8.5 grams, wearing it as you wear nothing
Range of Frequency: 2.4GHz-2.4835Ghz ISM Band Dimension: 56mm(L) X 17mm(W) X 14mm(H)
Talk time: Up to 5 hours talk-time
Standby time: Up to 100 hours
Normal charging time: Within 3 hours
Ear compatibility - Ajustable for both left and right ear. Rechargeable Li-ion ploymer battery.