Working voltage: 80 ~ 260VAC Test voltage: 80 ~ 260VAC Rated power: 100A/22000W Operating frequency: 45-65Hz Measurement accuracy: 1.0 grade Function: Electrical parameter measurement function (voltage, current, active power, energy) Overload alarm function (over power alarm threshold, backlight and power flashing to alarm). Power alarm threshold preset function (can set power alarm threshold). The reset function of energy key. Store data when power off. -screen LCD (display voltage, current, active power, energy at the same time) Backlight function. Display format: Power: test range: 0~22kW Within 1kW, the display format is 0.0~999.9W; Within 1kW~10kW, the display format is 1000~9999W; 10kW and above, the display format is 0.1~22.0kW. Energy: test range: 0~9999kWh Within 10KWh, the display format is 0~9999Wh; 10kWh and above, the display format is 10~9999kWh. Voltage: test range: 80~260V Display format: 80~260V Current: test range: 0~100A Display format: 0.00~99.99A Precautions: This module is suitable for indoor, please do not use outdoor. Applied load should not exceed the rated power. Wiring order can't be wrong. It can't be used in some circuit such as inverter or silicon controlled. Colour: black Material: composite materials Size: 9x5 (mm) Package Contents: 1 * PZEM-061 AC Voltmeter Ammeter 1 * Coil CT 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.