1、[Fast Heating] Aquarium heater with built in Al intelligent chip, PID computer control system, intelligent frequency conversion, automatic constant temperature. Titanium alloy stable heat conduction, fast frequency heating, energy saving and safety. 2、[Sensitive Probe] Compact submersible aquarium heater, dual temperature sensitive probe, sensitive detection, abnormal temperature safety. When in working condition, the red light is on, and when stop heating constant temperature state, the blue light is on. 3、[Power Off Out Of Water] Submersible fish tank heater built in power off from the water function, when the heating rod leaves the water, the LED screen will show L1, and keep flashing to remind, while the heater stops heating. 4、[Over Temperature Protection] Built in over temp protection system, when the water temperature exceeds 34℃, the display HH and flashing reminders, and stop heating, when the water temperature is lower than 15℃, will prompt LL, low temperature alarm. 5、[Easy To Use] Aquarium heater with outside the tank control, one key cycle, when changing water, please unplug the power switch first, to avoid the residual temperature of the heating body will damage the shell. LED HD display, heating failure at a glance. 6、[Working Principle] Instantaneous burst of heat when the fish tank heating rod starts, rapid heating to the specified temperature, after reaching the specified temperature turn intelligent constant temp mode, suitable for a variety of fish tanks. Item Type: Submersible Aquarium Heater Material: ABS Use: Fish Tank Heating Rod Power: 100W Temperature Control Range: 15-34℃ Applicable Water Volume: 30L 1 x Submersible Aquarium Heater 2 x Suction Cup