Describe:1. Waterproof and explosion-evidence-high transmittance quartz tube, sealed, waterproof, no leakage, high light transmittance, strong and explosion-proof2. 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 or 6H or 12H or 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 aquariumSpecification:Material: ABS and Quartz GlassPower: 5W or 13WSterilization mode: UV raysWavelength: 253.7 NMRated Voltage: 110V or 220VPower cord length: 82.7 inches (210 cm).Product Size: 11.0 x 3.5 x 1.6 inches (280 x 90 x 40 mm) or 11.8 x 4.9 x 1.8 x 1.8 inches (300Weight: 0.6 lbs (0.3 kg).4 Gear Timing: 3H or 6H or 12H or 24HEasy 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:1setx scheduled germicidal lamp Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.