Energy-Saving Smart Control:As the water temperature approaches your preset level, the heater automatically reduces power to 10%–30%, using residual heat to reach the target temperature smoothly and efficiently. The external controller is easy to use—each press adjusts the temperature by 1°C. Adjustable range: 59°F (20°C) to 93°F (34°C), giving you precise control for different aquatic needs.

Intelligent Thermostat Protection:Built-in overheat protection prevents overheating and protects your fish. If water temperature exceeds 34°C (93°F), the heater automatically stops heating. At around 35°C, an alert code appears and indicator lights flash as a warning. Once the temperature drops below 34°C, the heater resumes normal operation automatically.

Anti-Dry Safety Protection:Equipped with intelligent temperature sensing, the heater automatically shuts off and displays an “ER” code if exposed to air. Once fully submerged again, it resumes operation automatically. This feature extends the heater’s lifespan and enhances safety. The power-off memory function saves your settings, so no reset is needed after outages.

Enhanced Safety & Stability:The built-in LED digital display provides real-time temperature readings with ±1°C accuracy, supported by three internal temperature sensors for precise monitoring. Strong suction cups securely fix the heater in place inside your tank. Suitable for both freshwater and saltwater aquariums.