Type: DynamicFrequency Range: 200 - 6000 HzSensitivity: 50 - 56 dB re 1 uV @ 1 kHz/ 103 dBSPL/.187"Impedance: 150 ± 1.5 Ω @ 1 kHzDistortion: < 5 % @ 105 dBSPL / 200 - 6000 HzAltitude Compensation: 25,000 feetWeight: ≤ 45 gramsMIL-PRF-26542/1E