P/N: DP-M25
 
Specification:
Rate: 30-18000Hz
Sensitivity: -40dB(0 dB=1V/Pa at 1kHz)
Polar pattern: directional
Output impedance: 200 Ohm
Signal-to-noise ratio 76dB (1 kHz at 1Pa)
Battery type: 3V CR2 (included)