Type: Dynamic Frequency Range: 300 - 7000 Hz Sensitivity: -56 dB @ 1 kHz re 103 dB SPL Impedance: 150 + 15 Ω @ 1 kHz Distortion: < 6% @ 114 dBSPL / 300 - 7000 Hz Altitude Compensation: 50,000 feet Temperature Range: - 40 ºF < t < 150 ºF Weight: < 48 grams MIL-PRF-26542/10