The microphone shall be a subminiature electret-condenser microphone with omnidirectional polar pattern and a frequency response from 20 Hz up to 20 kHz. The microphone shall provide a output level of 8,9 mV/Pa and interchangeable equalization caps and windscreens as well as; extensive mounting material shall be included. 

Output Impedance: 136 Ohm
Output Level: -41.0 dBV/Pa (8.9 mV)
Maximum Sound Pressure Level (at 1 kOhm load, 1% THD): 138 dB SPL
Output Noise (equivalent SPL): 30 dB(A)
Power Requirements: 11 up to 52 V; 4.6 mA 
Diameter: 5.8 mm
Net Weight: 188 g (305 g with preamplifier)