NTC LED Range -50°C to 110°C Digital Temperature Controller AC 110V-220V W3230 Thermostat Control Switch with Display 10K Wide Applications: Suitable for various seafood machines, HVAC compressors, freezers, refrigerators, air conditioners, fermentation rooms, freezers, water dispensers, and other equipment that requires automatic switching between cooling and heating. Calibration Function: Temperature calibration allows you to adjust the temperature as needed. This digital thermostat is worth buying. [Practicality] You can choose cooling or heating operation mode. This thermostat can maintain your different environments within the ideal temperature range. Temperature control range: -50-110°C. Control accuracy is 0.1 degrees Celsius. Input power: AC 110-220V. </span></li> <li class="a-spacing-mini"><span class="a-list-item">【Safety】You can set the maximum/minimum temperature limit to avoid accidents. High temperature alarm: when the measured temperature reaches the set temperature, the controller will sound an alarm. </span></li> <li class="a-spacing-mini"><span class="a-list-item">【Easy to Use】This thermostat switch can automatically start cooling or heating to maintain a constant temperature. Bringing you a comfortable and convenient experience. </span></li> <li class="a-spacing-mini"></li> </ul>