【Specification】50W water heater, Australian Standard Plug, 20*2.5*2.5 cm(7.8*1*1in), suitable for 15-55L(5-15Gallon) tank, also suitable for saltwater and freshwater. 【Adjustable and Accurate】: The temperature is adjustable, and the adjustment range is 68°F-93°F (20°C-34°C). A free thermometer is provided, and the real-time temperature can be measured by sticking it on the fish tank. 【Safe】 The aquarium heater is made of 2mm thickened quartz glass, 33% thicker than ordinary glass, explosion-proof, which is very safe for people and animals. 【Stable and Practicable】 Beautiful in appearance, shorter length, can save more space for your fishes. Adopt 8-slot multi-branched heating wire ceramic frame, better heat dissipation, longer service life. 【Package Includes】50W Aquarium Heater*1, Thermometer Sticker*1, Suction Cup*3. 50W Aquarium Heater, 7.8 x 1 x 1 in, Australian Standard Plug,1.5M/4.9ft cable This heater is simple and beautiful in appearance, placed in your aquarium,unobtrusive, and will not destroy the fish tank landscape. You and your fish will like it. And it will turn off automatically when reaches temperature you set, without overheating. Features: 1. Good in maintain temp. 2. Both suitable for freshwater and saltwater. 3. Complete accessories: An extra stick-on thermometer(just peel and stick) and 2 extra suction cups are provided for spare(total 3). 4. Better construction: Adopt 8-slot multi-branched heating wire ceramic frame,better heat dissipation, 7.8 x 1 x 1 inch, saving more space for your fish. Cautions: 1. The heating part must be fully submerged in the water to avoid dry-burning,otherwise will cause damage to heater. 2. Please clean the heater regularly to remove dirt from the heating tube and keep it in good working condition. 3. Please make sure that you have turned it off and it has cooled down completely when you need to take it out from water. 4. It is forbidden to pull the heater adjustment knob outwards.