Bluetooth version: V1.2 Operating Distance: 10 Metres Weight:11.5 grams Range of Frequency: 2.4GHz Spectrum Dimension: 72mm(L) X 24.5mm(W) X 16mm(H) Talk time: Up to 15 hours talk-time Standby time: Up to 700 hours Ear compatibility - Adjustable for both left and right ear.