High temperature alarm, when the temperature reaches the setting temperature, the controller will alarm Temperature calibration, you can calibrate the temperature as needed W3230 controller, automatically start cooling or heating for constant temperature Temperature controller, set the upper or lower upper limit to prevent accidentsThe LCD digital thermostat can select cooling or heating working modeCan select cooling or heating working mode.Set the lowest or lowest upper limit to prevent accidents.Start automatically cooling or heating for constant temperature.Temperature calibration, you can calibrate the temperature as needed.High temperature alarm, when the measured temperature reaches the setting temperature, the controller will alarm.Specification:Range temperature: -55-120.Control temperature accuracy: 0.1.Display color: red and blue.Supply voltage: 24V.Data backup: yes.Relay: 20A.Dimensions: 79x43x26mm. Hole size: 74x39MM.Note:There may be a little color distortion due to different computer resolutions.Size errors may occur due to different computer resolutions.Package includes:1 x Digital Temperature Controller1 x Temperature Sensor temperature Note: The data are all manual measurement, please allow 1-3cm error, due to the light and display difference, there will be some color difference, depending on the received physical object.