This product, with UV sterilization function, can ensure the fish tank clear and bright effectively. It's very simple for use and great for effects. 

Specifications:
Body Material: Quartz Glass
Plug: EU Plug
Voltage: AC 220-240V 
Frequency: 50/60HZ
Wattage: 5W / 7W / 9W / 11W / 13W(Optional)
Power Cable Length: Approx. 200cm / 78.7in
Tube Diameter: 19mm / 0.75in
Lamp body Length: 
5W: 195mm / 7.67in
7W: 200mm / 7.87in
9W: 225mm / 8.86in
11W: 245mm / 9.64in
13W: 245mm / 9.64in
Package Size: 28.8 * 8 * 4.5cm / 11.34 * 3.15 * 1.77in
Package Weight: 5W: 258g; 7W: 259g; 9W: 245g; 11W: 271g; 13W: 271g

Notice:
1. The sterilizer should be placed in filter-tank, can't put it in the fish tank directly.
2. The product is for submersible use.
3. In use process, please cut off the power supply and stop using immediately if the lamp enters water.
4. The ultraviolet radiation will cause direct harm to human skin and eyes, please don't expose to use.

Usage Suggestion:
Please choose the suitable lamp according to the size of your fish tank and filter-tank. 3-4 times for a week and 10 minutes-1 hour each time.
If there has large number of algae in the aquarium or sick fish in the tank, can use this sterilizer 1-2 hours per day, but don't exceed 2 hours. When the symptom turns better, please return to normal use.

Package List:
1 * UV Light Sterilizer