Carefree Fish Aquarium 500W 2IN1 PTC Ceramic Heater PID Control Digital Dual Independent Chip Control The Safest Most Accurate and Fastest Heater for Freshwater and Saltwater Tank (No Cooking Fish)

Dual Heating Rods:Each heating rod has a chip control system with two different channels, respectively controlling the left and right heating rods. It starts with two heating rods simultaneously, doubling the speed at which the water heats.When one of the heating rods failed, the other heating rod was still functioning normally.This will ensure that your lovely fish won't die if the water suddenly gets cold.

PID Control:The temperature control is precise, error ±0.5℉. Variable frequency heating. When the water temperature approaches the set temperature, the power of the heating element will gradually decrease. Once the set temperature is reached, the heating element will operate at a low power of 50W to save electricity.

Dual Low Water Cutoff： When the water level is too low, the heating element will automatically stop working and display "Er". The dual water level sensor design ensures that the heating element will not be damaged due to low water levels.

Dual Overheating Protection:Two temperature controllers are installed inside. When the temperature is too high, the heater will stop working to prevent the situation of cooking fish.

PTC Ceramic Heater: Compared with nickel-chromium wire heater(Quartz and Titanium heaters) it has a faster heating speed and more stable heating performance. Under the same conditions, the temperature control of PTC ceramic heating rods can be more accurate, and it can avoid the heating rod from malfunctioning due to sudden temperature increase.500W.110~120V/60Hz.68~93.2℉,for 30~120Gallon fish tank.