Bluetooth version : V4.1 + EDR Warrenty: 2 Years. Supports Bluetooth HSP, HFP, A2DP and AVRCP Audio: With built-in Mic for hands-free calling Chipset Solution : CSR 8610 Frequency Range: 2.402-2.480GHZ, 2.4G ISM band Operating range: 10M (open space) Rechargeable 3.4V -4.2V/ 65mAh Li-Polymer Battery Charging time: 2 hours Talk time: 3 hours Music play time: 3 hours Standby time: Up to 80 hours Item weight: 12g Color: Black,White