Green LED 
multi stage
2 heat, 2 cool
easy menu driven programming
intuitive wake,leave,return,sleep programming icons
4 sq. inch display
easy access battery compartment
electric or gas configurable
separate B&O terminals
separate heating and cooling swing(cycle rate) adjustment including 2nd stage indicator( selectable on of off)
filter change indicator(selectable on or off)
room temperature calibration adjustment
5 minute compressor delay protection(selectable on or off)
easy wire color coded terminal blocks
universal sub-base
mounts on wall or junction box
battery or 24V power