A 1/4" (T1 3/4) LED displays voltage levels using colors in a stoplight style arrangement: RED - less than 11.5 volts, AMBER - 11.9 to 11.5 volts, and GREEN - 12 volts and up. Fuse protection, wiring, connector assortment and complete instructions are included. Simple 2 wire installation. Remember, GREEN means GO, AMBER is WARNING, RED means STOP! Designed for installation on bikes with a fairing or for custom installation. Drilling a single 1/4-inch hole is required to install the flush-mount LED in any flat surface near your instrument panel.