Extech EX363 Compact HVAC True RMS MultiMeter with Built in NCV LoZ prevents false readings caused by ghost voltages True RMS for accurate AC measurements Fast 60-Segment Analog style Bar graph for viewing trends with a 6000 Count LED display Built-in Non-contact AC Voltage Detector (NCV) with LED indicator Smart Data Hold freezes the reading on the display and automatically updates the reading and alerts user if the measurement changes 50 counts