•Microphone:
Directive: all-directional
Frequency: 20kHz
Sensitivity: -39 ±3dB
Output impedance: 2.2kΩ
S/N ratio: >58dB
 

•Speaker:
Mylar: 15mm
Frequency: 20 to 20kHz
Sensitivity: 96dB
Impedance: 32Ω
 

•Plug:
3.5mm stereo
Maximum length: 135cm