3M Peltor Tactical 6S Active Volume Hearing Protector Active volume hearing protector Reduces hazardous impulse noises from firearms to harmless levels within 5 milliseconds Localizes weak sounds and attenuates impulse sounds Equipped with separate microphone, receiver, amplifier and volume control; powered by four 1.5 Volt AAA batteries Features include easy storage and portability and they are lightweight.Amplifies low-level sounds up to 19 dB. Stereo microphones enhance sound localization.