[Simple to Use]: Temperature range: -40°C to 110°C. Easy to set and adjust with HD LCD display and 4 buttons. Relay-type temperature controller — external power supply required for the load. [High Current 30A Relay]: Rated for 220V AC, 30A. Suitable for high-power devices such as refrigerators, brooders, incubators, fermenters, and greenhouses. Connect power supply and heating/cooling equipment, place the sensor, and set the desired temperature. [Heating/Cooling Function]: Heating Mode (H): Relay activates when measured temperature is ≤ (set temperature − hysteresis); deactivates when measured temperature ≥ set temperature. Cooling Mode (C) operates inversely. [Delay Start & Temperature Correction]: Delay Start (OPH): After completing a heating or cooling cycle, the system waits for time T; next cycle begins only when T ≥ OPH. Temperature Correction (OFE): Adjustable from −10.0°C to +10.0°C to compensate for sensor drift. Actual temperature = measured temperature + correction value. [High-Temperature Alarm]: Triggers audible and visual alarm and cuts relay output when temperature ≥ alarm threshold. Press any button to silence alarm. Usage Steps: 1. Connect sensor to controller. 2. Connect power supply to controller. 3. Set start temperature, stop temperature, and temperature correction. 4. Disconnect power supply. 5. Connect load to relay output terminal with separate power supply, if required.