Fangrui Product Details Product Usage: Fan/signal Light Working Principle: When The Indoor Temperature Is Lower Than The Temperature Set By The Temperature Controller, The Circuit Is Disconnected And The Equipment Stops. When The Indoor Temperature Is Higher Than The Temperature Set By The Temperature Controller, The Circuit Closes And The Equipment Starts. Product Model:kto011 Single Control No Normally Open Contact Capacity:ac250v/10 (2) A Temperature Range:0-60colour:as Shown Material:plastic Size:33x33x60mm 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-CHhai shop 3