Single-function digital meter for measuring AC power RMS, to provide a single measurement. The electrical parameters can be measured 96mm × 96mm or 72mm × 72mm of the panel directly on the high-brightness LED display. To solve the current panel meters installed since the pointer cumbersome and save space for installation of panels; to provide users with clear, concise, accurate measurements; round for the user to improve economic efficiency. Offers a variety of optional models to suit different user needs