Venstar Slimline Programmable MultiStage Commercial Thermostat – T2800 (Replaces Totaline Models P374-2200, P374-2800) The Slimline Platinum Series offers the proven reliability and flexibility of Venstar thermostats. NOTE: 24V “common” wire to thermostat is required.  This thermostat is not suitable for 2-wire, heat only applications. The rich feature-set of this thermostat includes compatibility with many optional accessories.  See below for more info!Standard Features 7-day programmable with smart fan 3-Heat/2-Cool Up to 3-occupied periods per day Hi/Low outdoor temps of the day Energy Save Holiday mode Meets California commercial title-24 Controls to, or monitors a 2nd sensor Set point limiting Random start Up to 4 hours override 3 configurable outputs for maximum flexibility Heat pump compatible Backlit, color-coded keys and legends Large, easy to read backlit display Configurable programmable or non-programmable Configurable manual or auto changeover LED indicator glows green or red to indicate cooling or heating Service filter and UV light indicators Fahrenheit or Celsius display Non-volatile memory Keypad lock Accepts the Humidity Module Accessory Approximate dimensions – 4.8″ W X 4.5″ H 1 Year Warranty Guide to Optional Accessories with this thermostat: P474-0401 Indoor Sensor Provides Read Only Indoor Temperature Reading.  ACC0400 Outdoor Sensor Provides Read Only Outdoor Temperature Reading ACC0414RF  Wireless Temperature Sensor Provides Wireless Read Only Outdoor or  Indoor Temperature Reading  – Multiple Wireless Sensors Can Connect to the Reciever, Which Will Provide an Average for All of the Sensors.  Used in Conjuntion With ACC0414REC Receiver P374-0433 Comfort Call Remote Access Kit Provides Remote Access and Control via Standard Phone Line ACC0430 Humidity Module – plugs into Thermostat Circuit Boar