Describe: 1. Waterproof and explosion-evidence-high transmittance quartz tube, sealed, waterproof, no leakage, high light transmittance, strong and explosion-proof 2. Disinfection of fish aquariums - The aquarium is daily to remove aquatic , algae, and chlorine, keep the water in good condition and reduce the occurrence of fish. 3. UV Disinfection - UV radiation of 260-270 nm to destroy the RNA and DNA of microorganisms such , dust mites and insects to eliminate reproductive and survival ability and achieve the purpose of sterilization. 4. Timing Function - Starting at the set time (3H / 6H / 12H / 24H) automatically cycle and open each day. Example: Press at 12 o'clock, the first light will turn on, automatically turn off at 3:15, turn on automatically at 12:00 the next day, turn off at 15:00. 5. Note - Do not look directly at the disinfecting light source. Too much UV absorption may cause skin irritations and splint damage. This UV sterilization light cannot be as a lighting light and cannot be put directly into the aquarium Specification: Material: ABS + Quartz Glass Power: 5W / 13W Sterilization mode: UV rays Wavelength: 253.7 NM Rated Voltage: 110V/220V Power cord length: 82.7 inches (210 cm). Product Size: 11.0 x 3.5 x 1.6 inches (280 x 90 x 40 mm) / 11.8 x 4.9 x 1.8 x 1.8 inches (300 Weight: 0.6 lbs (0.3 kg). 4 Gear Timing: 3H / 6H / 12H / 24H Easy to install: Comes with a suction cup for fixing so you can place the UV light in the exact location of the filter system and fix it with the suction cup, making it very easy. Widely : multi-function lamp can be for clothing, electronics, toilet, pet room, automobile, and other household items. Package contains: 1set* scheduled germicidal lamp