No matter what water temperature your pet fish likes, it is vital to monitor the temperature of their habitat frequently and maintain the best conditions. Using a high-quality aquarium heater, you can easily monitor the water temperature and adjust it when needed to create and maintain the perfect living conditions for your pet fish.SpecificationProduct name: Aquarium HeaterProduct power: 25W, 50W, 100W, 150WTemperature range: 18°C-34°CPackage content: 1x aquarium water heaterMain features:1. Temperature range: 18°C-34°C, you can adjust the temperature you need, easy to operate.2. Automatic constant temperature function, when the water temperature reaches the specified temperature value, the heater automatically stops heating, and when the water temperature is lower than the set temperature, the heater automatically starts heating.Note:1. We measure by hand, there may be an error of 1-3cm, please refer to the actual product.2. When cleaning the sink, changing water or maintaining, please turn off the power 10 minutes in advance to avoid dry burning!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!