Element Back Electret Condenser Polar Pattern: Omnidirectional Frequency Range: 20 Hz ~ 20,000Hz Impedance: 250 Ω ± 30% (@ 1KHz) Operating Voltage: 9~52V DC Phantom Power Sensitivity: -63 dB ± 3 dB (0 dB=1V/microbar 1,000 Hz indicated by open circuit) Dimensions: Ø10(mic head) x 145(L) mm