Zen Smart Home Thermostat, Touchscreen, Compatible Heating Systems: Forced Air, Heat Pump, Gas, Electric, Millivolt, Hydronic, Compatible Cooling Systems: Heat Pump, Evaporative, Hydronic, One or Two Stage Heat and Cooling, Two Stage Heat Pump with Auxiliary Heat, Fan Mode: Auto or On, Energy Star Certified, 24VAC, 2 Amps, Dims: H-7/8" W-4-3/8" L-4-3/8", Weight: 1 Lbs, Mfg. Box, Made In Thailand.(Alt ZZEN01W)