Walker's Game Ear Power Muff Digital Quads with AFT Increases Hearing up to 9 times with 50dB of power for the highest rating in the industry Sound Activated Compression (SAC) circuit helps protect hearing from harmful muzzle blasts Four Independent High-Frequency Microphones with 2 independent volume controls Adjustable Frequency Tuning (AFT) - allow crystal-clear reception Anti-Bacterial and Lightweight