Protect your hearing with the Pro 200 electronic earmuffs by Pro Ears. These ear muffs have dual circuit boards and soft comfortable Pro Form ear seals and individual volume controls (no exposed wires.) The headband is strong spring steel construction Amplifies normal non-harmful sounds while blocking out harmful sounds like gun blasts. These muffs have a Noise Reduction Rating (NRR) of 19 and utilize exclusive DLSC Technology to compress loud sounds. 250 hour battery life. Batteries included.