Features Measurement and monitoring of electrical parameters (voltage, current, kWh, watts). Large screen LCD liquid crystal screen with full display function (voltage, current, kWh, watts). Backlight Preset function for the power alarm threshold (can set up its own power alarm threshold) Overload alarm function (more than watt alarm threshold, backlight flashes) Power (kwh) button reset function. When the device is turned off, save the data, when it is turned on, resume the date. Specification: Operating voltage: 80-260VAC. Test voltage: 80-260 VAC. Maximum power: 100A/22000W Operating frequency: 45-65Hz. The measurement accuracy: class 1. About the display: Display interface. Thanks to the large LCD display, LCD monitor, voltage and current, kWh, watts, electrical parameters. 1. Watt: the measuring range of 0-22 kW. Less than 1kW: 0.0-999.9W Less than 10kw:1000-9999w Less than 22 kW: 10.0-22.0 kW. 2. kwh: the measuring range from 0-9999kwh Less than 10kWh: 0-9999Wh More than 10kWh: 10-9999kWh 3. The test voltage range of 80-260 V. Display format 80-220 V. 4. Current test range: 0-100A Display format: 0.00-99.99A About the button: - Backlight control Can turn the backlight on/off by briefly pressing - Power reset. Step 1: long press the button (approx. 5 seconds) until the display flickers, and then release the button. Step 2: If you press the button briefly again, the power (kwh) will be reset to 0 and the exit will flicker Step 3: If you press the button for 5 seconds until it no longer flickers, the power data (kwh) will not be erased and exited. - Set the alarm clock (watts). Step 1: Long press the button until the LCD screen shows "SET CLr", release the button. Step 2: Display alarm value (watts), short press, increase value (number). Do not press the button for 3 seconds, the setting changes to another bit Step 3: Long press the button (approx. 5 seconds) ----> save the watt threshold value. Threshold adjustment watt range: 0-22.0 kW. Notes: 1. Suitable for indoor use, not for outdoor use 2. Should not exceed the rated power. 3. Wiring can't be wrong Package List