UPGRADED BLUE-BACKLIT LCD DISPLAY: The household electrical analyzer adopts a digital large-backlit LCD display, and the LCD display has a 180 full-width field of view, which is clearly visible, allowing you to easily read and record data in the dark, and accumulate kWh circuit memory , easy to read and record data. OVERLOAD PROTECTION: When the power of the whole machine exceeds the rated power of the display 1650W, the LCD will display "overload" with a roar to warn the user, and automatically disconnect the power supply of the plug-in ammeter, allowing you to use electricity safely and securely. MULTIPLE PARAMETER MEASUREMENT: CO emissions (CO/KG), power (W), energy (KWh), voltage/Hz, amps/Hz, power factor, min power and max power, 8 modes of household kilowatt meter for you choose.