Fangrui Product Details Output:relay Output Or Dc Voltage Output For Ssr (please Note: Ssr Output Or Relay Output Are Used For Temperature Control, It Only Be Activated When Measure Temperature Value Lower Than Set Temperature Value , They Are Independent From Timing.) Temperature Range:-20 To 600 Celsius Temperature Unit:celsius Degree / Fahrenheit Degree(user Can Program It Inside) Time Unit:second Or Minute (user Can Program It Inside) Time Range:0-999s Or 0-999min Power Supply:100v-240v Ac Colour:black Material:abs+metal Size:72x72x26mm,mounting Hole Cutout Size:68x68mm Package Contents: 1 * Temperature Controller 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.