AKT1 Sport Sound Amplification Earmuff, Premium Ear Pro for Shooting, NRR 25. Package Dimensions? 5.94 x 5.63 x 4.61 inches; 8 ounces. Department? Unisex-adult. Batteries? 2 AAA batteries required. Date First Available? October 27, 2018. Country of Origin? China. And we will work with you to resolve it to your satisfaction.