5-2 Day Programmable, 1.73 square inch display, Early Temp Schedule Recovery System, Electric or fossil fuel fan mode, manual changeover, 12/24hr clock formats, F/C temp display, 5-min compressor delay protection, hardwire or Battery, highly accurate +/- 1°F, On-Demand Back Lighting, Energy Star qualified, Temporary Hold, Permanent Hold, Permanent memory retention, Cool On-Snowflake indicator, Heat On-Flame indicator, compressor protection hold indicator, replace battery indicator, batteries included. 2 year limited warranty.