Horn diameter :Φ50mm

Sound principle: moving circle

Minimum power :20mw

Maximum power :30mw

Frequency response range: 20Hz-20kHz

Impedance :32Ω±15%

Horn sensitivity :120db±3db

Head diameter :Φ4.0*1.5mm

Sensitivity: -42±3dB

Thread length: 2.1 m braided thread

Earmuffs material: imitation leather

Color:Black,black and red,black and blue