Wireless Type: Bluetooth EDR(both sides), Ultra Low Consumption Bluetooth Version: V5.3 Bluetooth Mode: A2DP 1.3/HFP 1.6/HSP 1.2/AVRCP 1.6/D 11.3 Frequency: 2.4 GHz Transmission Distance: About 15 – 25 m Driver Diameter: 10 mm Playback Time: Upto 5 – 6 Hours Standby Time: Approx. 72 Hours Charging Time: Approx. 1-2 Hours Battery Type : Li-Polymer Battery