XMT-xxxx Series Intelligent PID Temperature Controller are the multi-functional regulators adoptingthe Mini processing units. The instrument has automating function to self adapt to different systems. The instrument can also be degrees Celsius, degrees Fahrenheit temperature. Five control optional: 0.One alarm relay 1.Relay contact PID output 2.One alarm relay output;SSR all the way non-contact level PID output 3.One alarm relay output;SSR-level all the way back to poor control output 4.Backlash relay control output Colour:black Material:plastic Package Contents: 2 x Thermostat Digital 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.