With earpiece, back electret condenser, compatible with common wireless systems, Polar pattern: omnidirectional, frequency response: 20 - 20,000 Hz, sensitivity:-45dB (+ /-3dB), Output impedance: 1500 ohms, max. Sound pressure level: 130dBSPL, S / N Ratio:> 70dB, Supply voltage: 1.5-10V, cable length: 1.2 m, color: beige, Including 2x windscreen and four AC adapter,