Large ear cup designed for extreme noise environment. Maximum hearing protection. Great for range masters and NRA shooting instructors. Best firearms shooting protection in covered or indoor shooting ranges. Ideal for use with all handguns. Scanner compatible for motor sports spectators. Apple iPod, CD, motor sports scanner or radio compatible using a 3.5 mm mini jack. Enjoy high fidelity sound while protecting your hearing. Better than isolation headphones for blocking out unwanted noise while listening to music. NRR 33. Weight: 13.5 oz. Five Year Warranty.