Pressure Gradient, JFET impedance converter with bipolar output buffer, Capsule 0.50", Polar Pattern Cardioid, Frequency Range 20Hz - 20kHz, Output Impedance 100Ω, Maximum SPL 143dBSPL, Maximum Output Level 13.9mV (@ 1kHz, 1% THD into 1KΩ load), Sensitivity -38.0dB re 1 Volt/Pascal (12.00mV @ 94 dB SPL) +/- 2 dB @ 1kHz, Equivalent Noise Level (A-weighted) 16dBA, +24V phantom power +48V phantom power