AC 22KW 110 220V Digital Voltmeter Ammeter 20A 100A Current Voltage Meter Power Energy Amps Volt wattmeter tester detector Features and specifications: This combo meter is designed to monitor AC power. It combines several functions into one. Voltage 85~250VAC Current 0.01-20A / 100A( Please choose the range you need, if you choose 100A, please connect it as 100A wire connection, no matter what current you test ) Energy 5-digits, 0.01~99999KWH Compatible frequency 50/60HZ Built-in current sensor Power Supply: 85~250Vac (self-powered) Voltage Range: 85V~250V Current Range:0.01~20A /100A Resolution:1V, 0.01A, 0.01W, 0.01kWh Display Type: LCD Dimensions: 84 x 46 x 26 mm Functions: 1. Electrical parameter measurement function (voltage, current, active power, power). 2. Overload alarm function (over power alarm threshold, the back-light and power flicker tips). 3. The power alarm threshold preset function (can set up your own power alarm threshold). 4. The power button clear function. 5. Power-down data storage function. 6. Large-screen LCD screen full display function (display voltage, current, active power, power). 7. Backlight. Package Content 1 x AC Voltage Current Power Energy Meter Note: AC 100A comes with a CT Coil, There is no coil for AC 20A. 20A Wire Connection Output 1-4 Input 3-4 1-Zero Line Output 2-Zero Line Input 3-Zero Line Input 4-Fire Line Input Output 100A Wire Connection (If you choose 100A, you need to connect it like 100A, no matter what current you test) Transformer 1-2 Input 3-4 Output 1-4 1-Transformer Red Wire 2-Transformer Black Wire 3-Zero Line Input 4-Fire Line Input