Specifications: Bluetooth Version 2.1+EDR Echo cancellation and noise suppression Answer & end call, call rejection, last number redial Voice dialing function, call transfer, microphone mute Advanced Built-in microphone and speaker Full duplex sound quality Bluetooth Profile Supported: HFP, A2DP, AVRCP Operating Distance: Up to 10 meters Music Time: Up to 4.5 hours Talk Time: Up to 5 hours Standby Time: Up to 1000 hours Normal Charge Time: Approx. 3 hours Dimension: 105x52x23 mm Weight: 120.5g. Compatibility All Bluetooth-enabled Cellphone, Smartphone and Tablet Return Policy: We DO NOT offer refund on ALL Bluetooth Headsets. If defective, you may return this item to exchange for the SAME ITEM only.