Designed for operational discreet communication and silent calls. It provides audio signal transmission and wireless reception when working with radio communication sets equipped with false response protection system and tone dialling.
Suitable for operation at temperatures from minus 10 ºС to 40 ºС and high relative humidity to 95% at temperature of 25 ºС.
| Average sound pressure level of the telephone in the frequency range from 400 to 4000 Hz, not less than, dB | 80 |
| The module of the electrical impedance of the telephone at a frequency of 1000 Hz, Ohm | 20 ± 4 |
| Paraphonic sensitivity of the microphone, not less than, mV / Pa | 5 |
| Depth of volume control of the receiving circuit, at least, dB | 20 |
| Sensor steady-state voltage, not less, V | 1,8 |
| Weight, no more | 70 г |
