Walker"s Game Ear II HD +AFT (adjustable frequency tuning) increases hearing up to 8 times and has 50 dB of power. With AFT, the user can adjust the Game Ear to focus specifically on frequencies that will allow the user to fine tune the unit to their individual hearing needs, for crystal clear reception, in any environment. Walker"s Game Ear devices include a Sound Activated Compression circuit that when combined with the ear plug design protects hearing from loud sounds such as muzzle blasts. The Noise Reduction Rating of 29 decibels is among the highest in the industry. Each BTE unit also weighs less than 1/4 ounce - so light you hardly notice it - and wears comfortably behind the ear even when wearing glasses. Walker"s Game Ear is the outdoor industry leader in hearing enhancement with hearing protection. They have been helping hunters and shooters enjoy the outdoors and take more game for nearly 20 years. Features of all High-Definition Digital Game Ears: High-Definition Digital Sound Reproduction; Delivers More Distortion-Free Sound; Quiet Performance with; Less Circuit Noise; Increased Sensitivity Equals Better Hearing; More Accurate Sound Reproduction; New Ergonomic Design is More Comfortable; New Design Offers Wind Noise Reduction; Includes: High Definition Digital Game Ear II / AFT Adjustable Frequency Tuning / SoundTube Earplug