The all-digital, 20-bit audio processor inside Walkers Digital HD Game Ears increases your natural hearing by delivering distortion-free sounds with less circuit noise. Its Sound-Activated Compression circuit coupled with its outstanding noise reduction rating (NRR) of 29db protects your hearing from muzzleblasts. A water-repelling Nano coating protects the entire earpiece from liquids without affecting functionality. The comfortable foam sound tube reduces wind noise. At less than 14 oz., theyre hardly noticeable. Wear them with or without eyeglasses. Features an 8-band graphic equalizer, four digital sound processing channels, volume and automatic feedback control, and a low-battery tone indicator. Uses one No. 13 battery. Includes earplug, carry case and four batteries. Sold per each. Available: Game Ear HD Elite One environmental adaptive listening mode. Includes Walkers field carrying pouch. 40dB of hearing enhancement. Game Ear HD Power Elite Four program settings - General, Crowds, Nature and Power Boost. Adjustable Frequency Tuning - AFT. 50dB of hearing enhancement. Includes Walkers field carrying pouch. Game Ear HD Pro Elite One environmental adaptive listening mode. Adjustable Frequency Tuning - AFT. 50dB of hearing enhancement. Includes Walkers field carrying pouch. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Behind The Ear.