"Speaker size: Φ 30mm
Frequency range: 20-20, 000Hz
Speaker impedance: 32 Ohm± 15%
Speaker sensitivity: 105dB± 3dB
Microphone impedance: 2200Ω
Microphone sensitivity: -58dB± 2dB
Maximum power: 100mw
Standard operating voltage: 4.5V
Wire length: 2.2 metres "
Frequency range: 20-20, 000Hz
Speaker impedance: 32 Ohm± 15%
Speaker sensitivity: 105dB± 3dB
Microphone impedance: 2200Ω
Microphone sensitivity: -58dB± 2dB
Maximum power: 100mw
Standard operating voltage: 4.5V
Wire length: 2.2 metres "