The current DIN Din Voltage amperemetre is used to measure voltage and alternating current, and calculate the active , the reactive and the factor at the same time.It works by driving the wire through the hole, especially to check the high devices at all times, thus ensuring our safety.Display voltage, current and simultaneously through the digital LED tube.DIN rail installation and easy measurement, just connect to and direct the wire through the hole.Wide voltage and current measurement range.Compatible with all home appliances, allowing you to monitor their electrical condition at real time.Help to remind you to shut down high appliances, preventing safety problems and saving electricity.Easy to install on a DIN rail.High precision, easy to use.Made of high quality ABS materials, it is safe, reliable and durable.Material: ABScolor: WhitePrecision: 1%, +/- 2 wordsDisplayer: AC and AC voltage with 4-digital 0.31 inch LED; Active , and reactive factor with 5-digital 0.31 inch LEDMeasuring range: AC voltage 200-450V; 0-100.0A alternating current; active : alternating voltage 80.0-300.0V: 0-30000W; reactive : 80.0-300.0V: 0-30000VA; factor: 1,000 to 0,000Measuring speed: about 2 times per secondMounting width: = 3P (DZ47 / C45, switch position)Installation Path: DIN rail (DIN rail universal step, not included)Size: 8 * 5.4 * 6.4cm / 3.15 * 2.13 * 2.52 inchPackage Contents:1 * ammeter meter voltmeter1 * User Manual (English)Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.