Product features:
Driver unit: , 40mm x 2
Impedance: 32
Sensitivity: 98 4db s.P.L at 1khz
Response (system): 20hz~20khz
Rated power: 20mw
Power supply: lithium battery/dc 5v
Built-in 400mah rechargeable battery
Plug type: micro usb
Unique selling point:
Bluetooth version: v3.0
Anc optional: significant noise reduction at 16db
Support: hsp, hfp, a2dp, avrcp profiles
Bt transmission distance: 10-15m
Built-in microphone for calling function
Soft headband & ear pad to bring comfortable wearing
Unique & fashionable design
Clear & powerful sound
Support aux in function
