Application- Updated version with timer (3h, 6h, 12h, 24h), when you set the timer, the UV sterilizer light will work at the same time for the same time next day. Different timer modes designed for different needs. Different timer modes designed for different needs. Dual Use- IP65 waterproof, our UV light can be used in water or exposed to air to keep room, fish tank, closet and household items clean. Avoid being covered by bacteria. Awesome Effect- Powerful UV light greatly improves the speed and intensity of regular sterilization, capable of eliminating bacteria and algae, extremely effective and fast to use. Superior Silica Glass - With excellent light transmittance and ultra-durability, the service life of the germicidal lamp is about 10000 hours, which will greatly save your cost of replacement.