When winter comes, many fishes and turtles need a warm environment to spend the winter safely. In order to give your cute fish a warm and safe living environment, we design this high security heater.very suitable for pet fish and turtles. A warm environment can survive the winter safely.SpecificationProduct name: Aquarium HeaterProduct power: 300W, 500W, 800WPackage content: 1x aquarium water heaterNote:We measure by hand, there may be an error of 1-3cm, please refer to the actual product.Before powering, make sure the heater is completely submerged in the water.Before removing the heater out from the water, make sure the heater is unplugged to avoid dry heating.Please NOT put the aquarium heater into the sand as this will cause INACCURATE heating.Thank you for your choice, if you have any questions during use, please contact us, we will reply you within 24 hours, I wish you a happy life!