Features: 1.[Temperature Display] Fish tank temperature controller has an external probe, and can also display the temperature of the fish tank water to observe the temperature of the water in time. 2.[Point Control] Fish tank thermostat adopts the proportional calculus algorithm for temperature control, which can keep the temperature constant at one point for point control. 3.[Stable] During the temperature control period of the aquarium thermostat, the heat output is relatively linear, and the temperature rise is relatively gentle, and there will be no sudden change in temperature. 4.[Immediate Feedback] Aquarium temperature controller has sensitive performance, fast induction, real time feedback of real time temperature, and monitoring of fish tank temperature at all times. 5.[Mode Switching] Press and hold the external adjustment button of the over temperature controller for 5 seconds to switch the temperature display mode between Celsius and Fahrenheit at will. Specification: Item Type: Aquarium Temperature Controller_x000D_ Material: ABS_x000D_ Probe Length: Approx. 200cm/78.7in_x000D_ Application: Fish Tank Over Temperature Protector_x000D_ Plug Voltage: 110-220V_x000D_ Light Display:_x000D_ Display Blue Light: Indicates Failure and Immediately Stop Power Supply_x000D_ Displays Red Light: Indicates Normal Operation_x000D_ Temperature Control Range: 28-33_x000D_ Rated Power: 2000W PackageList: 1 xAquarium Temperature Controller 2 x Suction Cup 1 x Hook Note 1. This product is not a heating rod, but prevents the heating rod from overheating and causing the water to boil and boil the fish._x000D_ 2. Manual measurement, please allow some errors.