Pro Ears -  Pro Mag Gold - Electronic Hearing Protection and Amplification - NRR 30 - Shooting Range Ear Muffs Pro Ears Gold Series electronic hearing protection and amplification, audiophile sound Features military grade dual circuit boards, gold connectors for high quality audiophile sound Fast attack time of 1.5 milliseconds Exclusive DLSC Compression Technology Weighs only 13.5 ounces Automatic shut off after 4 hours of inactivity Pro Form Leather ultra comfortable ears seals & padded, adjustable headband Includes 4 N size batteries and 3.5mm input jacks for i-pod and MP3 players. Battery life is 250 hours Ships in Certified Frustration-Free Packaging Five (5) Year Warranty Made in the USA