Orlushy 300W 500W 800W Submersible Aquarium Heater, Variable Frequency Fish Tank Heater with External Digital Display Controller, Run-Dry and Overheat Protection for 30-220 Gallon Tanks (300W)

【Precise Temperature Control】 This fish tank heater is temperature adjustable with external controller. It is designed to be digital display that set temp and real-time water temp will be displayed on the controller. The set temp ranges from 65 to 93℉ by pressing the “+, -” buttons. Attention: please keep the controller away from water for it is not water-proof. 【Run-dry & Overheat Protection】 If the heater is connected to the power but not in the water, or the heater is out of the water when the power is on, the heater will automatically power off with run-dry protection. With over-heating protection, the heater will stop working once the temperature exceeds 95℉. The heater will start to work again until the temperature is back to 94℉,preventing your fish from being “cooked”. 【Variable Frequency Heater】 In the initial heating stage, heater will work with higher wattage. When approaching the set temperature, working wattage will be reduced to a low value to reach the set temperature smoothly, saving energy as well as letting your fish feel more comfortable. 【Durable Material of High Safety】 The durable material of the heater ensures safe operation. The outer shell covering the whole body of the heater is made of heat-resistant ABS material that it won’t deform and melt under high temperature. The two built-in heating rod is made of nickel-chromium heating wire for faster heating, and non-corrosive quartz glass. 【Appilcation】: Orlushy 300w aquarium heater can help maintain the freshness and healthiness of fish. It is suitable for 30-60gallon fresh water and marine water fish tanks, aquariums. There is sensible thermometer to sense the real-time water temp, more convenient for you to monitor the stability of your fish tank.