Type: Dynamic Frequency Range: 200 - 5000 Hz Sensitivity: 2.5-5 MV @ 1 KHz re 74db SPL Impedance: 5 Ω Altitude Compensation: 50,000 feet Temperature Range: - 54 ºC < t < 55 ºC Weight: ≤ 16 grams Water proof MIL-PRF-26542/9