Standard Features - 6-Square Inch Blue Display - Stages: Heat Pump, 4 Heat / 2 Cool; Multi-Stage 2 Heat / 2 Cool - 7-Day or 5+1+1 Day Programmable or Non-Programmable - Programmable Fan and Remote Sense Capable - For 24 VAC or Millivolt Systems - 3-Wire Zone Valve - Tri-Powered Hardwired, Battery Powered or Power Stealing Battery Assist