These Digital NMEA 2000 gauges are a great space saver. They help you keep track of your engine outputs in remote locations away from your main data screens. They are most use away from the helm, at your chart table or at a remote steering location such as a flybridge or deck steering position on a fishing boat. One of the great thing about a NMEA communication system is the ability to use the data as many times as you need to, Your screens and these gauges can all use the same data at the same time.