The Razor Slim electronic earmuffs feature an ultra-low profile compact design. Compact Electronic Hearing Protection. With its ultra-compact design, the Razor Slim electronic muffs offer superior hearing protection in a low-profile design. Two hi-gain omnidirectional microphones pick up outside noise and broadcast it through full dynamic range HD speakers for an ultra-clear, balanced sound. Sound activated compression has a blazing fast 0.002 second reaction time to ensure your hearing is always protected. The Razor Slim electronic earmuffs are priced right and packed full of innovation.