No hub required Installs quickly like a standard thermostat. Unique horizontal or vertical mount capability. Easy set-up and programming directly from unit. Free iOS or Android App makes home comfort flexible & mobile. App features geofencing option with easy "away" and "back" settings for added savings and comfort. Three power options: battery only (2-AA lithium batteries), micro-USB connection (cord not included) or system power (C-wire). The best alternative to Ecobee or Nest. $85 OBO