Firstly Introduction:thermostat is for cold storage, seafood storage, water heater, and so on. Secondly Main Function: Cooling or heating mode/Periodic or intellectual defrost Fan control/Temperature calibration High/low over temp. warning Temp. output delay protection Sensors failure warning/Buzzer warning/External warning input Main Specification       Sensor wire: 1.5 meters long (sensor included)     Sensor: NTC     Setting range: -40~120℃     Display range: -50~130℃     Power supply: 185~245Vac, 50/60Hz     Terminal wire: ≤ 2*1.5mmP2, or 1*2.5mmP2     Load: 3A, 10A, 250Vac (resistance)     Storage: -30~70℃     Working: -10~45℃     Working: 5~85%RH without dew     Case materials: PC ABS fire proof     Protection level: IP65 (Front side only)     Dimension: L78 x W34.5 x D71 (mm)     Installation drilling: L71 x W29 (mm)