1. Using high-quality materials, the quality is guaranteed2. AC voltage range: AC80.0-300.0V/300.0-450.0V (depending on the range you )3. Automatic power saving: Power saving when power is off. The power savings will continue to accumulate the time you turn it on4. Small and beautiful appearance5. High-definition LCD color display, the display is clearer and more intuitive.Wide range of applicationsparameter:Display color: red orange yellow white green blueProtruding size: 45x16mmInstallation : rail typeMeasurement accuracy: 1% 2 wordsMeasurement speed: 2 per secondAC current: AC 0-99.99A, minimum resolution 0.01APower frequency: 45.0hz -65.0hzPower factor: 0.00-1.00pfActive power: 0-45000w When the active power is between 0 and 9999.9w, the display accuracy is 0.1wElectric power: 0-999999kwh, when the electric power is between 0 and 999.99 kwh, the display accuracy is 0.01kwh, the display accuracy between 10000.0-9999.9kwh is 0.1kwh, and the display accuracy between 10000.0-999999kwh is 1kwhApplication 1. According to the wiring , connect the green wire of the secondary current transformer to the blue end of the instrument, and make the wire of the measurement loop pass through the hole on the current transformer.2. Power on and the measurement and display the results.3. Press and hold the button for 5 seconds, the power is zero.Precautions:1. The wrong voltage connection will damage the meter2. The meter can only be used to measure 50hz AC mains, for input (green terminal) and secondary current transformer (blue terminal) will be damaged. Measure square wave, inverter output and calibrated sine waveColour:As ShownMaterial:plastictype:BPackage Contents:1 x Meter( AC40-300V ExternalCT)Only the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.