Feature: 1. Safe and Durable: The exterior is made of glass and plastic, with mechanical quartz heating rod inside, safe and explosion proof, stable and heat resistant. 2. Adjustable Temperature: This aquarium heating rod is adjustable with knob, precise temperature, easy to use, clear water level line scale, easy to read. 3. Waterproof Design: Fish tank heater adopts three layer sealing and waterproof design, IPX8 safety and waterproof without electricity leakage, safe and durable. 4. Intelligent Temperature Control: Submersible heater adopts mechanical intelligent temperature control technology, heating for one hour, constant temperature for three hours. 5. Fast Heating: Submersible thermostat heater uses iron chromium wire, fast heat conduction, energy saving and power saving. Anti corrosion, freshwater and seawater are applicable. Specification: Item Type: Aquarium Heater Material: Glass, Plastic Plug Specifications, Voltage: UK Plug 220V Use: Fish Tank, Aquarium Heating Rod. Package List: 1 x Aquarium Heater2 x Suction Cups Note: 1. Use the heating rod completely submerged in water, to prevent burning the rod body, melting the protection shell and other situations cause unnecessary trouble.2. Because the heating rod heating speed is fast, try to place the heating rod in the position of rapid water flux to let the fish tank evenly heated.3. It is not recommended to use the heating rod in the bottom filter, because some bottom filter water level is not enough to submerge the rod body, and lead to accidents.4. Please do not bury the heating rod in the bottom of the fish tank gravel mud, because the gravel and water have different specific heat capacity, which will lead to damage to the heating rod.5. The heating rod will work with a slight electrostatic (12V or less) is safe, please rest assured that the use.