Fangrui Product Details -1000HX temperature controller features cooling and heating modes with automatic switch, temperature unit switch between Celsius and Fahrenheit, temperature control by set-point and differential, temperature calibration, cooling output protection delay, sensor fault alarm and other functions. The controller reserves an interface of -485 communication function for further connection to an IoT module which makes remote control available. DIY Design Use Wiring Diagram, A more economical and practical choice. Stable and Reliable, Flame retardant ABS for plastic shell Up to V0 level, Passed EMC anti-interference test. Alarm and Parameter Setting - Audible and visual alarms when temperature exceeds temperature limit or when sensor error occurs. Allow to set parameters: temperature calibration, Refrigerating control output delay protection, Celsius display, It save set parameter when the power is off. Temperature Range:-55鈩?248鈩?Sensor Probe:2m Please note:the physical slightly color difference or difference,