emerson sensi wi-fi smart thermostat for smart home, pro version, works with alexa, energy star certified sensi low voltage wifi thermostat, stages heat 4, stages cool 2, temp. settings per day 4, programs per week 7, terminal designations c, g, l, o/b/2, rc, rh, w/e, w2, y, y2, wifi capability yes, system switching auto-heat-cool-off-emergency, fan switching auto-on, display size 2-1/2 in x 2 in, display type digital, key pad lockout yes, programmable fan no, automatic changeover yes, humidification control yes, dehumidification control yes, remote sensing capability no, temporary program override yes