[Delay &Temperature Correction Function]: Delay 'OPH': When a heating or cooling job is completed, the system starts timing 'T'. When T equal OPH, the system can perform round of heating or cooling work. Temperature Correction 'OFE'(-10.0-10.0℃): When the system works for a long time, there may be deviations, which can be corrected by this function. Actual temperature = measured temperature + calibration value. [Heating/Cooling Function]: Heating Mode 'H' : when the detection temperature less than equal set temperature - hysteresis temperature, the relay is turned on, and the heating equipment starts to work; When the detected temperature equal the set temperature, the relay is disconnected and the heating equipment stops working. The principle of Cooling Mode 'C' is the same. [High Current 30A Relay]: High power: 220V 30A. It is can be used high power equipment, like refrigerator,brooder,incubator,Fermenter, Greenhouse,etc. Connect power supply and heating/cooling equipment, place the probe and set the temperature, it work great. [Simple to Use]:The temperature range for this temperature controller is -40-110℃. Convenient to set and adjust, with HD LCD display and 4 buttons. It is a relay temperature controller, you need to connect additional power supply for the load. [High Temperature Alarm Function]: When the actual temperature equal the alarm temperature, the system turn on the sound and light alarm and disconnect the relay, press any button to stop the sound and light., Manufacturer: Jnchdghwa