Features: This combo meter is designed to monitor AC power, it combines many functions in one. Backlight control, short pre to turn on/off backlight, Automatically save data when power is turned off in backlight state Clear energy reading, pre and hold down the key to clear the reading of kWh. With Overload alarm, Power alarm threshold preset, Store data, Reset function Measurement precision, large-screen LCD liquid crystal screen display clearly. Function: 1. Electrical parameter measurement function (voltage, current, power factor, power, Hz, Energy). 2. Overload alarm function (over power alarm threshold, the backlight and power flicker tips). 3. The power alarm threshold preset function (can set up their 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. Parameters: Voltage:Measuring Range:80-260V Current Measuring Range:0-100A / 0-10A Frequency Measuring Range: 45-65Hz Power Factor Measuring Range:0.00-1.00PF Power Measuring Range:0-22000W, Starting power: 0.5W Energy Consumption Measuring Range: 0-999kWh Specification: Current types: 100A, 10A Power supply: 80~260V AC Display type: LCD Shell material: Reinforced nylon Dimensions: 89.6x49.6mm/3.53x1.95inch Color: Black Quantity: 1 Pc Package includes: 1 x Power Energy Monitor 1 x Current Transformer (When you buy 100A specification) 1 x Instruction manual