Product details:

For Direct Control of Line Voltage Valves and/or Blower Motors on Fan Coil Units Featuring Manual Changeover from Heat to Cool and a 3-Speed Fan Switch, Subbase Included Features: Mounts to a standard vertical outlet box or on a two-gang outlet box. May also be mounted on a 4 x 4 junction box with an adapter (not provided). Wiring color coded for ease of installation. 3-speed manual fan switch: High - Medium - Low. OFF breaks both valve and fan circuits. Beige color.