Microphone device УМД-2М
Produced according to specifications
УМЯИ.467271.053 ТУ
It is designed to work in communication equipment, to work together with the on-board information recording system, as well as for use in oxygen masks.

Suitable for operation at temperatures from minus 60 ° C to 55 ° C and at elevated relative humidity up to 98 % at 35 ° C.
Operating frequency range, Hz 300 – 4000
The output voltage at a sound pressure of 109 dB at a frequency of 1000 Hz at a load of 300 Ohms 210 ± 60
Supply voltage, V 3 – 7
Weight, no more 20 г
Overall dimensions, mm ø 27,2 × 26,0