Efficient Heating: The 500w aquarium heater, made of quartz tube, provides rapid and efficient heating with superior thermal conductivity. Equipped with a smart thermostat, it maintains temperature accuracy within ±1. Intelligent Thermostat: The aquarium heater features chip temperature control and automatic power-off when out of water. External temperature control allows for adjustable settings from 20°C to 34°C, ensuring peace of mind and safe fish keeping. Enhanced Safety Features: An LED digital temperature display allows real-time monitoring with a temperature accuracy of ±1°C. The heater automatically stops heating when the set temperature is reached and is firmly secured in the fish tank with strong suction cups. User-Friendly Operation: The aquarium heater shuts off when exposed to air and starts automatically when fully immersed in water. It also includes a memory function to retain the previous temperature setting without requiring reconfiguration.