This Harmony 9001K red indicator light with transformer and plastic dome is supplied with 110VAC. It fits into a 30mm hole. This one-piece indicator light with transformer provides clear visual feedback on the status of your machines. It is easy to install in a standard 30mm diameter panel cutout and connects with simple screw terminals. With clear colors and illumination via an integrated LED, it is clearly visible from a distance and allows complex machine statuses to be read at a glance. Thanks to its IP66 protection rating, it is shockproof, dustproof, waterproof and vibration-resistant, making it ideal for use in harsh environments.