?Built-in Thermometer, Power-off Memory Function?Dual built-in temperature sensor, the water temperature will be displayed on the external temperature controller in real time. No need to buy other aquarium thermometer. The heater will remember the temperature setting, no need to reset the temperature after power off. ?External Temperature Controller, Never Wet Your Hands?Use an external controller to set the temperature instead of immersing your hands in water to rotate the dial. Never wet your hands or contaminating your tank. Easy to install. ?Overheating Protection & DC 5V USB supply?The power will be cut off and stop heating automatically if the heater overheating. Protect your fish. Never cook your fish. USB 5V power supply, prevent electric shock. 30days full refund, 12-months warranty. ?Automatic Constant Temperature with 1? Accuracy?Thanks to advanced Intelligent Frequency Conversion Technology, the water temperature can be kept constant with an accuracy of 1?. 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 49% electricity bill for you. ?Super Mini Size, 10Watt, below 1 Gallon?YukiHalu 10W aquarium heater is designed for the mini fish tanks less than 1 gallon. Compact design, take less space in the fish tank, easy to hide in the tank. Temperature can be accurately adjusted from 64 to 93°F. The rated voltage DC 5V/2A. Important tips: insufficient power of the adapter will cause no heating and the number will flash or the controller restarts repeatedly, make sure the power adapter is 5V 2A and has enough power.

Best Sellers Rank: See Top 100 in Pet Supplies. : B09LM8S7WS. Manufacturer: YukiHalu. Date First Available: December 10, 2021. Product Dimensions: 0.71 x 0.71 x 1.97 inches; 8.78 Ounces. Is Discontinued By Manufacturer: No.