JAHEA Small Aquarium Heater,Submersible Adjustable Mini Fish Tank Heater 20W,Betta Heater

Product details

• 🐡Overheating Protection, Out of Water Protection - Full consideration of safety. With the multiple protections this fish tank heater will stop working when the water level is lower than the minimum water level or when the water temperature exceeds 97°F. You are free from “cooking fish”!(Note: The heater must be fully submerged when in use!).
• 🐢Multi-purpose – This heater can be used for both fresh and marine water. It can be not only used as an aquarium heater, but can also work for turtles, pet fountains, and plant seedling..
• 🐠Super Mini Size - 20W small aquarium heater is “thumb size” - only 2.36” (6cm) in length. Great for nano tanks / betta tanks. The innovative super mini size perfectly solves the headache of the fish keepers on the traditional heaters! Takes up less space, easy to hide, but in full power! Temperature range is 64-93°F, for 1-4 Gallon tanks..
• 🐟Automatic Constant Temperature - Thanks to advanced Intelligent Frequency Conversion Technology, the water temperature can be kept constant with an accuracy of 1°F. The heater's working frequency will be changed according to temperature variation, and the heating is automatically stopped when the set temperature is reached. Compare to traditional heater, this new technology will cut down electricity bill for you..
• 🐙External Controller and Memory Function - External temperature controller, no need to get your hands wet, no need to buy other controllers, 52 inch long power cord, strong suction cups, easy to install., easy to control.The last setting is stored in the thermostat. Dual built-in temperature sensor,in case of a power cut, when the power recovers the heater will follow the last setting..