The E-Max Pro high quality electronic hearing protection from Caldwell delivers style and comfort for all day use, plus it comes in youth and adult sizes and an array of colors. With a 23dB noise reduction rating 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 allow easy adjustments. Features Runs on AAA batteries (3x, batteries are included) NRR 23dB Low Profile Design Earmuffs Stereo Audio Input Jack Dual Microphones for Directional Clarity Digitial Volume Controls Grey/Black Finish