The Caldwell E-Max Pro Electronic Earmuffs feature high quality hearing protection with style and comfort for all day use. The E-Max Pro features a low-profile design for an uninterrupted cheek weld and a 23dB noise reduction rating. The E-Max Pro has easy-to-use push button volume controls and a compact folding design. The E-Max Pro Earmuffs have many great features perfect for any shooting range.Features23db Noise Reduction RatingLow-Profile Design for Uninterrupted Cheek WeldHigh Quality Stereo SoundEasy to Use Push Button Volume ControlsIlluminated On/Off IndicatorAuto-Shutoff (4 Hours without Touching Controls)Runs on Caldwell's Rechargeable Lithium-Ion Battery Pack or 3 AAA Batteries (Included)Compact Folding Design