Specification:
Bluetooth Version 5.0
Transmission Distance: Within 10m
Operation Frequency range: 2.4026-2.480GHz
Normal charging time: 2.5 hrs
Noise canceling: 25+/-3dB
Music Time: 9hrs , Calling Time: 10hrs
Battery Capacity: 300mah
Driver Unit: 40 mm
Sensitivity: 100dB S.P.L at 1KHz
Impedance: 32Ohm
Frequency Range: 20Hz - 20KHz
Maximum input Power: 100 mW