Caldwell E-Max Pro Electronic Hearing Protection - Aqua - The E-Max Pro high quality electronic hearing protection from Caldwell delivers style and comfort for all day use. With a 23dB Noise Reduction Rating (NRR) and a low-profile design, you can stay comfortable and protect your hearing on the range. High quality stereo sound keeps what you want to hear crystal clear and easy to use push button volume controls make for easy adjustments. Runs on 3 AAA batteries, which are included, and is compatible with Caldwell's Rechargeable Lithium-Ion Battery Pack (sold separately) Auto-Shutoff After 4 Hours Without Touching Controls Low-Profile Design For Uninterrupted Cheek Weld Dual Microphones For Directional Clarity 23dB NRR High Quality Stereo Sound Illuminated On/Off Indicator Includes 3 AAA Batteries Compact Folding Design