Valhalla NRR 23db Electronic Hearing Protection Communications Headset

NRR 23db electronic hearing protection and 2-way communications headset Automatically cuts off harmful noises above 82dB while amplifying quiet sounds by up to 18dB for increased situational awareness 2 selectable audio profiles:-Outdoor (Environmental microphones reengage once unsafe noiselevels pass)-Indoor (sound suppression stays engaged for increased time afterthe last unsafe noise level is detected to protect against reflectednoise) NATO-US wired U174 downlead Silicon gel ear cushions Powered by 2x AA batteries (not included), 270 hour battery life