The Walker's Razor Rechargeable Electronic Muffs protect your hearing without compromising sound clarity. These tactical ear muffs are housed in a rugged, rubberized body for sound damping. They are engineered with full dynamic range HD speakers for vibrant and balanced sound. With a reaction time of 0.02 seconds for sound activation compression, these ear muffs are designed to work in challenging environments. The 300mAh rechargeable lithium battery offers a whopping 80 hours of performance, ensuring your ear protection is always ready when you are. With a built-in USB charging port and a USB charging cable included, charging is a breeze. Choose between sleek black or flat dark earth.