Submersible Aquarium Heater with Thermometer, LEDGLE Fish Tank Heater for 3 to 5 Gallon Betta Tank, Saltwater or Freshwater Aquariums, Turtle, Auto Intelligent LED Digital Display

🐠Automatic Constant Temperature: Automatically maintains the temperature around 25-28℃. The aquarium heater starts heating when lower than 23℃. 🐠Come with Diving Thermometer: The fish tank heater 3 gallon much safer to observe the water temperature of the fish tank at any time. ℉ and ℃ are available. Much safer if the temperature of the fish tank can be monitored at any time. 🐠Compact & Portable Heater: 5.3x1x0.7in. Fast heating, smart thermostat is designed for 3 to gallon betta fish tank and takes up a small space. 🐠Simple Installation: With 2 suction cups at the bottom, the aquarium tank heater can easily adsorb on fish tank. To make the tank temperature go more uniformity,please make the heater installed near the water outlet or inlet. The heater must be 100% immersed in water. Please unplug the power when cleaning the fish tank or changing the aquarium. 🐠Widely Used: Anti-explosion and 1P68 Waterproof, small thermostat creates ideal warm water conditions for your fish