The LUX/GEO WiFi thermostat puts the flexibility and control of home comfort in the hands of the homeowner, either via smartphone device, desktop or the product's intuitive control panel. Equipped with features and functionality found in higher-end, more expensive thermostats. Can be powered by system power C-wire, micro USB plug or AA lithium batteries. With up to 2 heat, 2 cool compatibility (heat pumps up to 2 heat, 1 cool), the LUX/GEO will work on virtually all systems. Sets up quickly on any home WiFi system but can easily be used without a WiFi connection, eliminating need for homeowner to be home.