🐠 Upgraded YukiHalu Small Size Submersible Aquarium Heater | Mini Fish Tank Heater 50W/100W with Built-in Thermometer, External Temperature Controller | Dual LED Temperature Display | Ideal for Fish & Turtles Review

【Compact Size & Quiet, 50 Watt Heater】 YukiHalu upgraded small aquarium heater is suitable for 2-8 gallons mini fish tanks. More compact than comparable 50W heaters and takes less space in your tank, easy to hide in the tank. Temperature can be accurately adjusted from 64 to 93°F. This heater suitable for both saltwater and freshwater. The rated voltage is 100-130V. 【1°F Accuracy & PID Control Strategy】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 49% electricity bill for you. 【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. 3 Strong suction cups, easy to install. 【Built-in Thermometer & Dual LED Display】The water temperature will be displayed on both the heater and the external temperature controller in real time. No need aquarium submersible thermometer any more. 【Overheating Protection & Out of Water Protection】The power will be cut off and stop heating if the heater out of water. Protect your hands and your fish. Sturdy engineering plastic shield, scalding resistant and explosion resistant. 30 days full refund, 12-months warranty.