Sport wireless waterproof Bluetooth headset/headphone/earphone. It is a wireless waterproof bluetooth headphones，Very good for Noise Cancelling. Standard:Bluetooth CSR40.Mode:HSP/HFP/A2DP/AVRCP/DIV/APT-XFrequency Range:2.400-2.480GHz.Weight:16gOperating Range:up to 30 feet(10metres)Charge Voltage:3.7VCharging time:<2 hourTalking time:4 hoursMp3 playing time:Up to 5 hours.Standby time:up to 60 hours.Charge Voltage:3.7V