Characteristics: 1. High quality filament for high performance and energy savings. 2. Adopt a glass quartz glass tube for high transmission of ultraviolet rays. 3. Powerful suction cups to freely adjust the position. 4. Waterproof and safe design for completely submersible use. 5. The independent power switch is ideal for safer use. 6. Suitable to control malignant bacteria in aquariums and aquariums. Specifications: Power: 5 W/7 W/9 W/11 W/13 W (optional) Type of taking: EU/United States (optional) Tension: EU: AC220240V; United States: AC110120V Body material: quartz glass Cable length: approx. 150cm/59 inches size (d*l): 5 W/7 W: 20 mm x 177 mm/0.8 inch x 6.97 inches 9 W: 20 mm x 220 mm/0.8 inch x 8.66 inches 11 W/13 W: 20 mm x 240 mm/0.8 inch x 9.45 inches Quantity: 1 piece Opinion: 1. The sterilizer must be placed in the filter tank, cannot put it directly in the aquarium. 2. The product is intended for submersible use. 3. In use, please cut the power supply and stop using