BeeWi BBH100A0 Bluetooth Headphone, Black Bluetooth Version Bluetooth 2.1 + EDR Bluetooth Profiles HSP, HFP, A2DP, AVRCP Range Class 2, 10 meter Use time Music: Up to 25 hours Communication Up to 25 hours Standby time Up to 200 hours Power +5.00.3 VA Charging Time Around 4 hours