4 sq. inch display. Blue backlight. Glow in the dark light button. Easy access battery compartment. Electric or Gas configurable. Separate B & O terminals. Separate heating and cooling swing (cycle rate) adjustments including 2nd stage adjustments. Filter change indicator (selectable on or off). Room temperature calibration adjustment. 5 minute compressor delay protection (selectable on or off). Simple private label badge system. Easy wire color coded terminal blocks. Universal sub-base. Mounts on wall or junction box. Battery or 24v power. 5 year warranty.