This accessory kit will let you know accessories are on or off at the touch of your finger tips and the voltage output at the touch of your finger tips. Includes: wire harness, lighted switches, LCD voltmeter and chrome ABS plate. Plate measures 2 ¼ inches x 2 ¼ inches and uses self-adhesive tape to mount. Drilling is required for installation. Fits the GL1800 or on any flat surface. Single.