MC101 series instruments: four-digit LED digital display,measurent accuracy 0.3%. the maximum resolution 0.1 degree at thrmocouple and thermal resistance input, the maximum resolution 0.001 at analong input. Universal input, support 10 different types of thermocouples and RTD inputs by customers at panels. the thermocouple and thermal resiatance of instrument input signals can be set freely. Uses it in Heating Control as well as for Cooling control Auto-tune function can find the best PID parameter automatically Displays temperature in Celsius (Celsius) or Fahrenheit (Fahrenheit) Four digits LED display can go up to "9999" Uses it for Kiln,Furnace,Oven,Incubator temperature control It is used in various industries to control and monitor process temperature Short Shell Relay contract + solid-state relay( SSR) voltage output (just support one group output) Colour:Black Material:ABS+electronic components Size:5.0 cm x 5.0 cm x 10.0 cm Package Contents: 4x PID Digital Temperature Controller 4x English User Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.