Buyers Products 8 Function Programmable Switch Panel is commonly used with 49, 54, and 60 in. modular light bars. It comes with a relay that allows the switch panel to deliver additional amperage to lighting accessories with higher power demands. The programmable panel supports up to 8 functions, and can be used to control multiple lights and/or other equipment. The included button labels, and backlit buttons make it easy to mark and control functionality.