● Headphones:

a) Frequency response: 125Hz～8000 Hz, ±17 dB (0dB=20uPa) (input power=1mW);

b) Electrical impedance: 32Ω±20％;

c) Characteristic sound pressure level (sensitivity): ≥100dB/1mW (0dB=20uPa).

● Microphone:

a) Frequency response: 40-20000HZ

b) Type: electret microphone;

c) Free-field sensitivity: -47±2 dB (0 dB=1V/Pa);

d) Directivity type: unidirectional.

Specially designed for digital language labs, the headset features a single-directional noise-cancelling microphone and stereo high-fidelity internal magnetic earphones. It is equipped with a specially crafted "copper-platinum alloy" spiral wire that is highly resistant to stretching and bending. The headset utilizes a 3.5mm round jack connector, ensuring durability and longevity.