This product, with function, can keep the fish and bright effectively. It's very simple for use and with effects.  <> <> Features: <> filament for high performance and energy-saving. <> Adopt explosion proof tube for high transmission of ultraviolet ray. <> Powerful suction cups for adjusting position freely. <> -proof design for totally submersible use. <> Independent switch is for safer use. <> Suitable for controlling malignant in aquarium and fish . <> <> Specifications: <> Wattage: 5W / 7W / 9W / 11W / 13W (Optional) <> Voltage: / / AU <> Body Material: <> Cable Length: Approx. 150cm / 59in <> *Product Size(D * L): <> 5W/7W: 20 * 177mm / 0.8 * 6.97in <> 9W: 20 * 220mm / 0.8 * 8.66in <> 11W/13W: 20 * 240mm / 0.8 * 9.45in <> Product Weight: 5W/7W: 125g; 9W: 134g; 11W/13W: 144g <> *Package Size(L * W * H) <> 5W/7W: 23 * 7.5 * 4cm / 9.1 * 2.95 * 1.57in <> 9W: 26 * 7.5 * 4cm / 10.2 * 2.95 * 1.57in <> 11W/13W: 28 * 7.5 * 4cm / 11 * 2.95 * 1.57in <> Package Weight: 5W/7W: 168g; 9W: 182g; 11W/13W: 190g <> <> Notice: <> 1. The should be placed in filter , can't put it in the fish directly. <> 2. The product is for submersible use. <> 3. In use process, please cut off the and stop using immediately if the enters . <> 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 according to the size of your fish and filter-.  <> 3-4 times for a week, do not use it exceeds 2 hours per day; please according to the actual situation. <> <> Package List: UU0201AU-13 <> 1 * Aquarium <> 2 * Suction Cups