The Pro Ears Stealth 28 weighs in at only 20 grams allowing for extended all-weather use, and the battery lasts 18 hours with a one-hour charging time. The great features of the stealth are the 5 times hearing amplification, sound compression technology, noise reducing wind cover over the microphone, and the Noise Reduction Rating (NRR) 28dB rated hearing protection. Pro Ears includes 3 incredibly soft ear bud sizes to fit any ear canal. What does this all mean for consumers? Pro Ears has created ultra-light hearing protection that is technologically advanced for all users, environments, and affordable. Pro Ears Stealth 28 comes with proprietary temple hugging design for a secure, comfortable fit with amplification up to 5X and sound compression. Perfect for shooters, yard work, concerts and everyday wear when ear protection is needed. Features: Noise Reduction Rating (NRR) 28dB Attack (Response) Time 2.0ms DLSC Technology Rapid USB Rechargable Port 5X Hearing Amplification Noise Reducing Wind Cover Incredibly Soft Ear Buds Ultra-Lightweight for All Day Comfort 1 Year Warranty