Stereo Electronic Hearing Protection automatically and instantaneously shuts down when decibel levels exceed 85 Db. When the decibel level falls below 85 Db, the control circuit restores normal operation. This hearing protector allows you to hear normal conversational levels while blocking out potentially hazardous noise from shooting sports, chainsaws, machinery and more. The volume level is adjustable with the on/off control switch. Features two built-in microphones, LED indicator, padded ear cushions and headband. Weighs 12 ounces.