Features Electrical parameter measurement functions (voltage, current, active power, electrical energy, frequency, power factor). The energy can be reset to use the key, and the data can be stored in the event of a power outage. Overload alarm function (over power alarm threshold, backlight and power flashing alarm). Power alarm threshold preset function (power alarm threshold can be set), large-screen LCD and backlight function. 100% brand new product, all refund if unsatisfied If you have any questions. Features: -Electrical parameter measurement functions (voltage, current, active power, electrical energy, frequency, power factor). -The energy can be reset to use the key, and the data can be stored in the event of a power outage. -Overload alarm function (over power alarm threshold, backlight and power flashing alarm). -Power alarm threshold preset function (power alarm threshold can be set), large-screen LCD and backlight function. -100% brand new product, all refund if unsatisfied If you have any questions. Specification: Model: PZEM-022 Working voltage: 80 - 260VAC Test voltage: 80 - 260VAC Current:100A Rated power:100A/22000W Operating frequency: 45-65Hz Measurement accuracy: 1.0 grade Size: 9*5*2.5cm/3.5*2*1in Wire length:19cm/7.5in Weight: Approx.110g/3.9oz Appearance and Key function: I. Display Interface Display interface is large-screen LCD, it can display six parameters at the same time. II. Display format Pay attention: 1. This module is suitable for indoor, please do not use outdoor. 2. Applied load should not exceed the rated power. 3. Wiring order can't be wrong. Package List 1 x AC Multifunction Digital Meter 1 x Closed Type CT