Multifunction Digital DC Voltage Current Power Frequency Meter Factor Detector with LCD Display Condition: Material: ABS Rated Power: 100A/10000W Measurement Accuracy: Level 1.0 Display Format: Power: Test Range: 0-10kW Display Format Within 1kW: 0.0-999.9W Display Format Above 1kW: 1000-9999W Electricity: Test Range: 0-9999kWh Display Format Within 10kWh: 0-9999Wh Display Format Above 10kWh: 10-9999kWh Test Range: 6.5-100V Display Format: 6.50-99.99V Current: Test Range: 0-100A Display Format: 0.00-99.99 Button: 1. Backlight Controlling The backlight can be turned on or off by short pressing the button, and the backlight state is automatically saved when the power is turned off. 2. Reset 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 in the state of zeroing clearing. If you press the button again for a short time, the power data is cleared and exits the state of zeroing clearing and flashing; Step 3: If there is no key operation within 5 seconds, it means that the power data is not cleared and exits the clear 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 exit the setting state. 4. Range Selection Step 1: Press and hold the button until the "Curr" character is displayed in the power display area, then release the button Step 2: At this time, the current area displays "100A". Short press the button to switch between "100A" and "50A" to indicate whether the range of the external shunt is 100A/75mV or 50A/75mV. Note that this meter can only use these two types of shunts. Step 3: Press and hold the button until you exit the setting state, or automatically save and exit the setting state after 3 seconds of no button operation.