?High Power?The 2200w high-power aquarium thermostat is compatible with most kinds of aquarium heaters, you don’t need to assemble the product yourself, just plug and play. The temperature setting range is 0.0?~45.0?/32.0?~113? and the detectable temperature range is -40?~100?/-40?~212?. ?Chitinous Heating Alarm?You can set 1-72 hours to heat the water.It is used to remind you whether the water temperature has reached the desired range or exceeded the desired range during the set heating time, then you can check the power of the heater is not large enough or the heater is broken. ?APP Notification?Pair the aquarium controller with your phone via 2.4GHz Wi-Fi, the device will alarm if there are exceptions. And all exceptions will be updated to the APP, the app will push notifications to remind you. An app can control multiple thermostats to work at the same time. Also, the aquarium temperature controller can be turned off at a touch of a button in the app. ?Two Probes?The aquarium heater controller will alarm if the temperature difference between 2 probes is bigger than 3?/5?(so it is suggested to place the 2 probes in same place). Please note the both probes should be placed in the same aquarium not for 2 aquariums, the 2 probes are designed for dual protection to identify a probe fault, your fish might be in danger as it is hard to know the probe is broken immediately if the temperature controller has only 1 probe. ?Dual Protection?The aquarium temperature controller is equipped with 2 relays to ensure that the power can be turned off under any circumstances, this will protect your fish from being hurt by overheated water.