Robertshaw RS3210 2 Heat/1 Cool Digital 5-2 Day Programmable Thermostat

With the comfort, convenience, and efficiency features that homeowners and contractors want, the RS3210 thermostat provides custom program options in an economical and value-packed thermostat.
Bigger brighter backlight makes it easy to read any time of the day
A fully adjustable temperature differential provides increased comfort control
The front load battery door makes it simple to replace the batteries
Low battery indicator
Filter change reminder