Specification: 
battery capacity(mah)：200-500 mAh
BT Wireless：Bluetooth v5.4
Estimated Battery Life：more than 20 hours
Battery Charging Time：1-3 hours
Estimated Battery Life：60% volume 50H
Noise Cancelling：22±3db
Impedance：32 Ω                    

 Feature:
noise cancelling：Active Noise Cancellation (ANC)
Waterproof Standard：IPX-4.
Control Method：button control
Volume control：Rotary adjustment
headphone form factor：over ear
Charging Interface Type：TYPE-C