here are the specs: (from dpamicrophones.com)
Principle of operation: Pressure gradient
Cartridge type: Pre-polarized condenser element with vertical diaphragm
Frequency range, ± 2 dB: 250 Hz - 17 kHz with typ. 4 dB soft boost at 4-6 kHz (-5 dB at 100 Hz)
Directional characteristics: Cardioid
Equivalent noise level A-weighted: Typ. 23 dB(A) re. 20 µPa (max. 26 dB(A))
Capsule diameter: 5.4 mm (0.2 in)
Total harmonic distortion (THD): <1 % uo to 123 dB SPL peak <1 % uo to 120 dB SPL RMS sine
Output impedance: 30 - 40 Ohm
Microphone length: 30 mm (1.2 in)
Max. SPL, peak before clipping: 144 dB
Weight: 15 g (0.5 oz) incl. cable and MicroDot connector
Cable length: 1.2 m (4 ft)
Cable colour: Black
Colour: Black
Dynamic Range: Typ. 100 dB
S/N ratio, re. 1 kHz at 1 Pa (94 dB SPL): Typ. 71 dB(A)
Connector: MicroDot
Sensitivity, nominal, ±3 dB: 20 mV/Pa; -34 dB re. 1 V/Pa
and, here are the graphs: