Caldwell E-Max Low Profile Electronic 23 NRR Hearing Protection w/ Sound Amplification and Adjustable Earmuffs for Shooting, Hunting and Range, Shooting Glasses COMFORTABLE: Padded headband and adjustable cushioned ear cups allows for a snug fit to ensure proper noise cancellation and protection. The low-profile design allows for a closer fit against your rifle for more accuracy and comfort HEARING PROTECTION: 23 NRR (Noise Reduction Rating) amplifies low sounds (below 85dB) and compresses high noises (above 85dB) to create the perfect range experience CONVENIENT: The lightweight designed muffs and the glasses are impact resistant and fold compact for transport. Shooting glasses feature an adjustable nosepiece and temples and block out 99.9% of UV rays (Glasses meet ANSI Z87.1 standards) EASE OF USE: Runs on 2 AAA Batteries (not included) with adjustable volume control and an audio jack for a phone or MP3 player