25W Small Submersible Heater: Suitable for 1-5 gallon fish tank; Temperature Control Range 59℉-93℉; When the temperature is lower than the set value 1℉, the heater automatically heat up; Automatically stop heating when the set temperature is reached
External Controller and Built-in Thermometer: Fish tank heater with a built-in thermometer, display water temperature of the fish tank in real time; HD LED display, the red light when heating, red light off when the temperature is constant, and display error code when the heater fault; The controller is not waterproof, please do not put it into water
Easy To Use: Set temperature by press the button until reach your desired temperature value; The display will flash the desired temperature value three times, then return displaying the current water temperature, setting is done; You can press the button persistently to display 59-93℉ in a cycle

【500W Aquarium Heater】500W aquarium heater is suitable for 75 to 130 gallons of saltwater and freshwater aquariums. Voltage 110-120V, temperature control range 59-93℉ (15-34℃).
【Safety and Durable】The submersible aquarium heater is made of explosion-proof quartz glass material and high-temperature resistant nickel-chromium heating wire, with silicon carbide thermal conductivity, safer heating and longer service life. The sturdy black shell is high-temperature resistant ABS material to protect fish, aquatic life and you from burns.
【Multiple Protections】①Over-temperature protection, it will stop automatically when the set temperature is reached, and it will automatically power off and buzz an alarm when it exceeds 97.7℉. ②Power off when out of water, the heating rod will automatically power off when it leaves the water surface, and the side probe prevents dry burning and fire. ③APS anti-boiling fish system, APS automatically starts when the heating rod is out of control, and automatically cuts off the power within 10 seconds