HEADPHONE Driver unit: 30mm diameter

 Impedance: 32 Ohm ± 15%

Sensitivity: 103dB ± 3dB at 1KHz

Frequency response: 20-20,000Hz

Maximum power input: 100mw

Cable length: 1.5m

MICROPHONE Type: 9.7mm daimeter electret condenser microphone Directivity: omnidirectional Impedance: 2200 Ohm ± 15%

Frequency response: 30-16,000Hz

Standard operating voltage: 4.5V