Feature: 1. Intelligent Temperature Control: The heater will automatically heat up to the set temperature; when the water temperature reaches the specified temperature value, it will automatically stop heating. 2. Fast Heating: Submersible aquarium heater heats up fast, 20W power, high efficiency, step heating, 26℃ constant temperature, water temperature can be increased by 6℃‑8℃. 3. Safe and Reliable: Fish tank heater adopts IPX8 waterproof design, explosion proof and leak proof, so you can keep fish safely, suitable for aquariums and fish tanks. 4. Scope of Application: The fish tank heating rod is suitable for 5L‑10L water body, suitable for freshwater and seawater, the water level can be as low as 1cm. 5. Note: When heating, the heater must be completely submerged in water. For your safety, please unplug the power supply when cleaning the water tank or aquarium. Specification: Item Type: Aquarium Heater Material: Glass Size: Approx. 12.5cm/4.9in Plug: EU Plug 220-240V Waterproof Rating: IPX8 Power: 20W Constant Temperature: 26℃ Scope of Application: 5L-10L Aquarium Fish Tank. Package List: 1 x Aquarium Heater Note: Please allow some errors due to manual measurement.