Smooth Eco-S Bluetooth Headset for HTC ThunderBolt Quantity: 1 Condition: New Color: Black Easy to Use Excellent Sound Bluetooth v2.0 Operating Range: Up to 10 Meters Charging Time: Approximately 2 Hours Talk Time: Up to 4.5 Hours Standby Time: Up to 100 Hours Dimensions (mm): L 33 x W 16 x H 9.5 Lightweight only 6.4g 3.7v Lithium Polymer Battery Ear-hook included Charger included