Digital LED voltmeters used to monitor real-time battery voltage. They display 12.4V across three different LED backlight color configurations: red, white, and green.These universal, waterproof panel-mount gauges operate on 12V–24V DC systems. They are commonly installed in custom switchboards or dashboards for vehicle configurations like:Automotive: Cars, trucks, off-road rigs, and camper vans.Marine & Powersports: Boats, jet skis, motorcycles, and ATVs.DIY Projects: Portable solar setups or ham radio power boxes.available colors red,blue,green,white