Hygger 300W Aquarium Heater With External Digital Temperature Controller Reef Saltwater Fish Tank Heater For 30-60 Gallon Tank

[Over Heat Protection] This fully submersible aquarium heater enables memory function and over heat protection. Auto shut off when over-heats resets when it cools down. [Made with Premium Quartz] and double sealed by black protective guard this fish tank heater is resistant to explosion and corrosion and protect fish and other livestocks from punching and scalding [Build-in External IC Temp Controller] easy to read blue LED digital number shows real time water temperature. Heat indicator lights on red when fish heater start to heat and turns in yellow once it reach set temperature. Temp accuracy is +/- 1°F. [Easy to Set Temperature ] without getting hands wet. Temperature can be precisely adjusted from 61 to 90°F (16°C ~ 32°C). Just press set button to desired temperature it blinks 3 seconds and begins to work [300 watt aquarium heater] voltage 110-120V suitable for tank capactiy 30-60 gallon freshwater and saltwater aquariums