Speaker diameter:Φ40mm With rolling microphone
In-line volume controller.
Impedance: 32 Ω at 1kHz
Sensitivity: 105dB±3dB S.P.L. a 1kHz
Frequency response: 20~20kHz
Maximum Power: 80mW
Microphone: 6x5/-58dB±2dB
Plug: Φ3.5mm Stereo