Our flow heater is the first to feature a Smart Heating System (SHS) - intelligent power adjustment technology. The microprocessor adjusts the heating power to maintain the desired temperature in the tank. This translates to smooth operation of the heater - without temperature fluctuations in the tank, and thus, without stressing its inhabitants. With the electronic thermostat, the LED display shows not only the programmed temperature but also the current water temperature. Electronic thermal sensors protect the tank from overheating and automatically shut off the device in the absence of flow. As the device is located on the outlet hose of the external filter, the hot water is evenly distributed in the tank. The heater is installed outside the tank, which does not occupy space inside the tank and provides more freedom in terms of interior decoration arrangement. First Smart Flow Heater - Features a Smart Heating System - adjusts heating power according to tank size and environmental conditions to optimize energy consumption - Equipped with a high-precision electronic thermostat providing an accuracy of ± 0.9 °F [0.5 °C] within a range of 68 to 91 °F [20 to 33 °C] - Easily set the temperature with a single button - one-touch system - LED display shows the programmed and current temperature values - 3 thermal sensors - 2 electronic, 1 thermal fuse - Heater automatically stops in the absence of flow - For use on hoses with a diameter of ⁵/₈ / ⁵⁵/₆₄ in freshwater and marine tanks - Included items: heater, two fixed holders, and fastening nuts Made in Europe Tank capacity [لتر] 100–600 Power [واط] 300 Temperature regulation [°م] 20–33 Accuracy [°م] 0.5 Overheat protection ✔ Dry run protection ✔ Fully electronic ✔