Features: -Remote sensing thermostat. -7 day programmable with auto season change. -Indoor/Outdoor remote sensing (includes one sensor). -Runs off as many as 2 sensors plus a 3rd outdoor sensor (additional sensors sold separately). -Compatible with most heating and cooling systems, including single stage heat pumps. -Tri-lingual Indiglo backlit display. -Energy Star certified. -Temperature, home today, and vacation overrides. -Energy, filter, and battery monitors. -Keyboard lock.