The Pro Ears Stealth 28 weighs in at only 20 g allowing for extended all-weather use, and the battery lasts 18 hr with a 1 hr 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: Attack (response) time 2.0 ms DLSC technology Rapid USB rechargeable port 5X hearing amplification Noise reducing wind cover Incredibly soft ear buds Ultra-lightweight for all day comfort 1 year warranty