1 Control Fund.Press the key to turn the backlight on or off, the backlight has memory function, you can store the on or off state when it is turned off. 2 restart powerStep 1: press the key for 5 seconds until the energy value flashes and then release the key.Step 2: Press the key again to remove the value and exit the intermittent reset state.Step 3: If the key is not activated within 5 seconds, it means that the energy value is not cleared and leaves the reset state. 3 Alarm threshold set.Step 1: Press and hold the key until the LCD SET screen sets CLr "and then release the key to enter the configuration status.Step 2: The window shows the current alarm value and the last digit starts to flash, then you can press more 1, when there is no operation for 3 seconds, the position of the digits will change automatically, the setting It is the same as the previous one. Step 3: Once the configuration is finished, press the key for 5 seconds to automatically store and exit, the active threshold range is 0.02222kw. 1. Operating voltage: 80 VAC 260VAC 2. Test voltage: 80 VAC 260VAC 3. Rated : 100A / 22000W 4. Operating frequency: 45-65Hz 5. Accuracy of measurements: grade 1.0 A Function 1. Measurement function of electrical parameters (voltage, current, active , energy, frequency, factor) 2. Overload alarm function (supercharge alarm threshold, backlight and flashing alarm light). 3. alarm threshold preconfiguration function ( alarm threshold can be set). 4. The can be restarted with the key. 5. Save the data when you are off. 6. LCD screen 7. Backlight function. B. Key appearance and function Me. Screen interface The screen interface is screen LCD, it can display six parameters at the same time. precautions 1. This module is suitable for indoor, do not use it outdoors. 2. The requested load must not exceed the rated . 3. The wiring order cannot be wrong. colour:black Material:plastic size:89.6x49.6x24.3mm Package Contents: 1 x PZEM-022 AC Voltmeter Ammeter 1 x Coil CT Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.