Pro Ears - Stalker Gold - Electronic Hearing Protection and Amplification Earmuffs - NRR 25 - Realtree APG Military grade Dual circuit boards & gold connectors for high quality audiophile sound Automatic shut off after 4 hours of inactivity Amplifies sound more than 8x normal hearing Padded, adjustable headband, Pro Form leather super comfortable ears seals 1.5 milli-second attack time Includes 4 N size batteries and weighs only 9.3 ounces - battery life is 250 hours Has 3.5mm Input jacks for i-pod and MP3 players Five (5) Year Warranty Made in the USA