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. Model: Razor Slim Electronic Color: Black Material: Polymer Size: Adult Nrr: 23 Db Style: Over The Head Battery: Aaa Includes: Batteries Electronic: Yes