The Backpack METRISO PRIME 10 with Backpack; GM-M555A is an advanced portable multimeter device from Gossen Metrawatt that lets you measure a variety of electrical parameters quickly and efficiently. It comes with a large LCD color display, intuitive navigation panel, and a menu-based operating system. It can measure current, voltage, frequency, capacitance, and several other parameters. It also has a number of built-in features, such as automatic data logging and safety check system. The device can work both as a one-phase and three-phase system, so it is ideally used for a number of electrical and electronic applications. It is supplied with its own carrying case, making it easy to transport.