... the storage temperature and evaporator temperature separately , NTC and PTC sensor can be exchanged; Celsius, Fahrenheit can be switch; Display Resolution ... avoid unreasonably setting of the user; Support many kinds of digital input (door switch, exterior alarm, refrigeration/heating mode switching, ... 0~60oC9. Storing temperature: -30~75oC SKY Elitech.liPE Double sensor ETC-50 Temperature Controllers