... Refrigerating, heating output mode optional2. Return difference to control temperature3. Temperature upper and lower limits setting, in order to avoid disoperation ... professionals.4. Compressor delay protection. Main Function:Refrigeration,heating,1NTC,Temperature CalibrationParameter:1. Power supply: 220VAC+10%/-15%, 50/60HZ ... H) * 62(D) (mm)SKY Elitech.liPE Refrigerating & Heating thermostat STC-100A