Simple two digit backlit display Simple four button user interface Setpoint, Mode and Fan controls On screen Setup controls 3” W x 5” H x 1” D TS16 Wall Display Unit (WDU) The TS16 provides a typical thermostat user interface with display of the current temperature, Setpoint or mode on a two digit Backlit LCD display. It has pushbuttons for Setpoint down, Setpoint up, mode and fan control. The TS16 has a digital temperature sensor and changes in temperature are sent to the Thermostat Control Unit along with any push button commands. The TS16 WDU also has connections for an Outside Temperature sensor and up to 2 Remote Indoor averaging sensors. This unit is for use with the ZCV4 or ZCV6 zone controller only.