1Support for electrical parameter measurement to measure voltage, current, active power and energy. 2Support overload alarm function, exceeding power alarm threshold power flashing alarm. 3Support power alarm threshold preset function, you can set the power alarm threshold by yourself. 4Supports the energy button clear function and the power-down data save function to save the accumulated power before power-off. 5The bright red digital tube display function displays voltage, current, active power and energy. 6Support for peak port communication function, with TTL serial interface, can communicate with various terminals through the adapter board, read and set parameters. Condition: 100% Brand New Item Type: Multifunctional Tester Model: PZEM-004 Power Test Range: 0~22kW 0~10kW, the display format is 0.000~9.999 10~22kW, the display format is 10.00~22.00 Energy Test Range: 0~9999kWh 0~10kWh, the display format is 0.000~9.999 10~100kWh, the display format is 10.00~99.99 100~1000kWh, the display format is 100.0~999.9 1000~9999kWh and above, the display format is 1000~9999 Voltage Test Range: 80~260VAC, Display Format is 110.0~220.0 Current Test Range: 0~100A, Display Format is 00.00~99.99 Working Voltage: 80-260VAC Test Voltage: 80-260VAC Rated Power: 100A/22000W Working Frequency: 45-65Hz Measurement Accuracy: 1.0 Product Size: Approx. 12 x 6 x 2.8 cm / 4.7 x 2.4 x 1.1 in Weight: Approx. 198g / 7oz border: 1px solid000important;}1 x Tester1 x Split-core Transformer1 x USB Adapter1 x Chinese English User Manual1. This module is suitable for indoor use and cannot be used in outdoor.2. The applied load cannot exceed the rated power.3. Wiring can't be wrong.