The Broan S99271514 SVC User Interface provides access to the operating settings of compatible range hood systems. This electronic interface contains the buttons or touch-sensitive components used to select available ventilation speeds and lighting options. When a user makes a selection, the interface sends signals to the connected electronic board, which processes the command and act... https://www.hnkparts.com/broan-s99271514-svc-user-interface-67945/4-S99271514.html