Pro1 IAQ T721 Non-Programmable 2H/1C Dual-Powered Thermostat

T721 Pro1 IAQ Non-Programmable, Heat Pump Thermostat 2H/1C, Display Light, Dual Powered  4 sq. inch display Blue backlight Glow in the dark light button Easy access battery compartment Electric or Gas configurable  Separate heating cooling swing (cycle rate) adjustments including 2nd stage adjustments  Filter change indicator (select-able on or off) 5 minute compressor delay protection (select-able on or off)  Room temperature calibration adjustment Universal sub-base Mounts on wall or junction box Battery or 24V power 5 year warranty