The telephone- microphone set "TMG-8A". Destined for classrooms of phonetics

Technical data
Microphone's sensitivity at the frequency of 1000 Hz, mV/ Pa, no less than 0,8
The reproduction frequency band, Hz 30-18000
Telephone's sensitivity at the frequency of 1000 Hz, Pa/V, no less than 12
Weight with cord, kg 0,35