The CleanGuard U-V Mouthguard carry case kills up to 99.9% of bacteria on your mouthguard. The CleanGuard U-V Mouthguard sanitizer is a mouthguard sanitizer that doubles as a mouthguard case. The CleanGuard uses Ultra-Violet light to kill up to 99.9% of harmful bacteria. The CleanGuard is as simple to use, as it is stylish to look at. Simply place your mouthguard in the battery-powered unit, close, and press a button. The CleanGuard illuminates the inner chamber with bacteria killing U-V light for a pre-set period of 10 minutes. Once 10 minutes have past, your mouthguard has been sanitized and is ready for use.