Conversion between Fahrenheit and Celsius?Long press the controller button for 3 seconds, the display can be converted between Fahrenheit and Celsius, which is convenient for users to adjust according to their own habits. External Controller and Built-in Thermometer?With a built-in thermometer, you can see the water temperature of the fish tank in real time,HD LED display,The Red light means when heating, the blue light means the temperature is constant. Protects Dry Burn Control System,Safe And Reliable?Adopt advanced explosion-proof quartz heating tube with anti-dry burning system double protection,more safer.When the heater tube running dry,the display shows “E1”,the heater will shut off automatically.The temperature exceeds 35°C/95°F,the display shows “HH”. Small And Exquisite,Power-off Memory Function?Small shape is ideal for small aquarium tanks,Made of premium material and with scientific design.The special plastic shell can effectively isolate part of the temperature and prevent scalding fish and turtle.No need to reset the temperature after power off. 15W Submersible Fish Tank Heater?Suitable for 1.3-5 gallon fish tank,Temperature Control Range 59?-93?,When the temperature is lower than the set value 1?/1?, the heater will automatically heat up, and it will automatically stop heating when the set temperature is reached.

Best Sellers Rank: See Top 100 in Pet Supplies. : B099RSWMYC. Manufacturer: AQQA. Date First Available: August 13, 2021. Package Dimensions: 6.89 x 6.89 x 1.93 inches; 11.36 Ounces.