Safeguard your hearing while enjoying superior sound clarity with the Walker's Razor Rechargeable Electronic Muffs. This tactical ear protection offers a reaction time of 0.02 seconds for sound activation compression and features full dynamic range HD speakers for clear, balanced sound. These ear muffs also have a 300mAh rechargeable lithium battery, providing 80 hours of battery life. This impressive ear protection comes with a USB charging cable and is available in black or flat dark earth.