Omnidirectional condenser boundary microphone, Frequency Response 30 - 20,000 Hz, Open Circuit Sensitivity -39 dB (11.2mV), Impedance 200 ohms, Max. Input Sound Level 132 dB SPL, Dynamic Range 111 dB, S/N Ratio 73 dB, Phantom Power 9-52V DC, 2 mA typical, Battery Type 1.5V AA/1200 hours,Weight 78g