HVAC Temperature Control Digtital Room Thermostats (S600) 2, Technical Parameter: Working Voltage: 85~265VAC, 50/60Hz Working Environment: Temperature: -10~+50º C Relative Humidity: RH<85% Storage Environment: Temperature: -20~+70º C Relative Humidity: RH<95% Temperature Control Range: 5~45º C Temperature Control Precision: 0/-2º C Grade of Protection: IP40 Surface Material: PC Engineering Plastic Installation: Wall-Inserted Type 3, Feature: Five different colors are optional: Golden, Silver, White, Light Grey, Dark Grey Large and clear LCD, with LED backlight, relay contact output Temperature Measurement Resolution: 0.1º C You can calibrate the measured temperature by keypress directly. With 5-1-1-day programmable function, 4 time periods a day for the settings of time and temperature With keylock function With mainframe linked function 2 years warranty for HVAC Temperature Control Digtital Room Thermostats (S600)