Bluetooth Blue Tooth Headset by Nexxus Retail Packaging Bluetooth V2.0 + EDR (enhanced data rate) Ultra small and lightweight - weighs 7g -Dimensions: L33 x W10 x H15mm Talk time: 4 hours -Standby time: Up to 140 hours Battery: 3.6V rechargeable Li-polymer battery Comes with headset, ear hook, ear cap, AC charging adapter, user manual