3M MT15H7F SV Over Head Headset, 26dB, Black (Case of 1)

Listen-only electronic headset amplifies ambient sound while canceling hazardous noise. Great for the shooting range and people with hearing loss. Hazardous impulse noises are suppressed to 82dB. Amplification of low level sounds up to 14dB. 2 AA batteries required. NRR 26dB*. *Research suggests that many users will receive less noise reduction than indicated by the NRR due to variation in earplug fit and wearing time. It is recommended that the NRR be reduced by 50 percent for estimating the average amount of noise reduction provided. Low battery warning signal. Automatic shut-off after two hours if no function is used. Battery life is approximately 1000 hours (AA Batteries). Warning signal when power is low. before shut-off. Audio input jack for external radio. Available as Bluetooth headset (A2DP profile). Not compatible with WS adapters. Level Dependent Function- Each cup has a microphone that captures all sounds. The electronics inside analyse the information and process the sound