YukiHalu Submersible Aquarium Heater 100/150/200/300W, Small Size, Overheating Protection, External Temperature Controller, LED Display, Used for 20/30/40/60 Gallons (100Watts)

【100Watt for 10-20 gallons】YukiHalu 100W aquarium heater is designed for 10-20 gallons fish tank. Temperature may also be appropriately adjusted from 64 to 93°F. This heater works well in both saltwater and freshwater. Rated voltage 100-130V.
【Compact size】only 13cm/5 inches length for 100W and 150W heater, 19cm/7.5 inches for 200W heater and 23cm/9 inches for 300W heater. Fits mini fish tank, it takes up less space and easy to hide in the tank. Easy to install
【Automatic thermostat at 1°F accuracy】The heater’s working frequency might be changed in keeping with temperature variation according to Intelligent Frequency Conversion Technology, and the heating is mechanically stopped when the set temperature is reached.
【Overheating and lack of water protection】Stop heating mechanically if the fish tank lack of water or overheating. Never cook your fish.
【External temperature controller】The temperature may also be set by external controller, and the water temperature value is displayed at the LED display without the need for an extra aquarium temperature meter. The heater will needless to say the temperature setting, no want to reset the temperature after power off.