Description The Pro Ears Stealth 28 Hearing Protection and Amplification has a proprietary temple hugging design for a secure and comfortable fit and weighs less than 1 ounce. The Stealth 28 is USB rechargable with up to 18 hours of operation and the rapid re-charge takes only an hour. Attributes Noise Reduction Rating is 28 USB rechargable with up to 18 hours of operation Rapid re-charge takes only about an hour Amplifies up to 5x and has Advanced Compression Technology to protect your hearing Ideal for use in conjunction with all types of hats and combat helmets More Information Color: Green Primary Color: Green Material: Plastic Country of Origin: China Unit of Measure: EA Item LxWxH: 6.00 X 4.00 X 0.30 Shipping LxWxH: 6.00 X 6.00 X 2.00 Weight: 0.28