M33TWS Earphone Bluetooth5.1 Wireless Earphone Stereo Earphone Base Game Headset Product Details
Operating Voltage: 3.1V ~ 4.2V
Bluetooth Profile: A2DP, AVRCP, HFP; HSP
Charging Voltage: 5V-1A
Headset Battery Capacity: 50mAh
storage box battery capacity: 2000mAh