1,Measuring function of electrical parameters (voltage, current, power, electric quantity). 2,Voltage alarm function (over voltage alarm threshold, backlight and power flicker prompt). 3,Power button reset function. It is designed to adapt to a poor light situation. 4,Power off data saving function, prevents from data losing when the power's off. 5,Full display function of large‑screen LCD (display voltage, current, power and power at the same time). Condition: Material: ABS Working Voltage: 6.5-100VDC Rated Power: 20A or 2000W Measurement Accuracy: Level 1.0 Display and Button Display Interface: The large LCD screen displays the voltage, current, power and power parameters simultaneously. Display Format: 1. Power: Test range 0-2kW The display format within 1kW is 0.0-999.9W The display format above 1kW is 1000-2000W. 2. Electricity: Test range 0-9999kWh The display format within 10kWh is 0-9999Wh The display format above 10kWh is 10-9999kWh Display format 6.50-99.99V 4. Current: Test range 0-20A The display format is 0.00-20.00 Button: 1. Control of the backlight The backlight can be turned on or off by short pressing the button, and the poor light state is automatically saved when the power is turned off. 2. Reset the battery Step 1: Press and hold the button until the ''CLr'' character is displayed in the power display area, and then release the button Step 2: At this time, the battery flashes to indicate that the battery is currently reset. If you press the button again for a short time, the power data is cleared and reseted and flashing Step 3: If there is no pressing operation within 5 seconds, it means that the power data is not reseted and exits the reset state. Step 1: Press and hold the button until the ''SET'' character is displayed in the power display area, and then release the button Step 3: After setting, press and hold the button until the screen displays ''PASS'' character to indicate that the setting is successful and automatically exits the setting state. 1 x DC Current Voltage Meter 1 x Instruction Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.