There is a built in Service Interval reminder that can be adjusted to offer a message, or restricting action, when an annual system service falls due Easy to read display Up to 3 events per day Automatic summer and winter time change Single pole, double throw (SPST) relay Line of text display providing text feedback Fits on standard industry backplate 5 Year Warranty Manufacturer Stock Code:ST9400S1001 EAN Code:5025121388405 Length:158 mm Width:113 mm Height:50 mm Weight:0.32 kg Sub-Category:Programmer Brand:Honeywell Home Manufacturer Part Number:ST9400S1001 Warranty:1 Years EAN Number:5025121388405 Category:Heating Controls Type:Wired