With a SpeedBar® multi-function button to help speed programming and changes to settings, this Braeburn® low voltage WiFi thermostat allows for the addition of Bluelink wireless indoor, outdoor, or humidity sensors for enhanced system control. Unit also allows Smart Wi-Fi connectivity on most residential or commercial application. Low Voltage WiFi Thermostat, Stages Heat 3, Stages Cool 2, Temp. Settings per Day 4, 2, 1, 0, Programs per Week 7, 5-2, 5-1-1, or Nonprogrammable, Terminal Designations RC, RH, W/1/E, W2/AUX, Y1, Y2, G, O/B, C, A, L, K, S1, S2, WiFi Capability Yes, System Switching Auto-Heat-Cool, Fan Switching Auto-On-Program, Display Size 5 sq. in., Display Type LCD, Backlit, Display Color Blue, Key Pad Lockout Yes, Programmable Fan Yes, Automatic Changeover Yes, Humidification Control Yes