Fungsi tombol sebagai berikut :
- A、B、C、D、E: Applied to choose the answer
- Device must be numbered by the short circuit device (please check the installation instruction).
- VOL: choose the volume
- PROG: choose multiple program channels
- UP:: go up the text exam question number under the free exam.
- DOWN go down the text exam question number under the free exam.
- CALL: call or race to answer.
Spesifikasi :
Freguency Response 63 – 10.000 Hz
S/N Ratio > 50 dB
Distortion < 3%
Input Mic – 60 dB
Intercom – 15 dB, 5000
Headset – 10 dB
