Function: 1 Scope of Application Suitable for frequency conversion power supply, air conditioner, refrigerator, other refrigerator, motor performance testing. 2. It features LCD digital display, full scale overload protection, data retention, and low voltage display. 3 1000A AC/DC Professional Clamp Meter, Non-contact Voltage Detection is suitable for laboratory, field measurement, household and large current measurement. 4 Multi-function clamp meter, AC current, AC and DC voltage, resistance conduction, temperature, capacitance, and frequency test function. 5 Sturdy and durable, made of ABS material, can be used for a long time without worrying about damage. How to use: Once you get the product, open the back cover, install the battery and adjust the measurement range. It is displayed on the display and you can use the measurement by selecting a parameter. 1) Turn the knob into Gear A, select the appropriate gear(60/600A or 1000A) and press the match button until the display shows "INRUSH". 2) Next, press the trigger to clamp the head, clamp the conductor to test, then slowly release the trigger until the clamp head is fully closed, and check whether there is a conductor to test & nb