The Hyskore Stereo Electronic Hearing Protector automatically and instantaneously shuts down when decibel levels exceed 85dB. Microphone amplifies sounds at safe levels, then blocks out potentially hazardous noises from machinery, chainsaws, firearms and more. Protector was originally designed for shooting sports. Solid-state circuitry resumes normal operation when noise level falls below 85dB. Adjustable Fit Yes, adjustable headband, AM/FM Radio No, Battery Required Yes, 2 AA, Case Included No, Hearing Protector Type Earmuffs, Noise Reduction Rating NRR dB 24, Pairs qty. 1, Disposable No, For Noise Levels Up To dB 85. NRR 24 dB 2 built-in microphones LED indicator Volume controls Comfortable padded ear cushions and headband Weights only 12 oz. with batteries Folds for compact storage Operates for approx. 200 hours on 2 AA alkaline batteries not included Includes belt clip. Model Number: 30150. UPC: 053807301504.