When using digital display measuring pen, the above two buttons, one is the direct measurement, one is the induction button. Use the thumb to hold down the button that measures directly (far away from the nib), with the metal tip touching the object to be measured. If it is to measure whether there is electricity inside the object or inside the wire, you should touch the button with your thumb (close to the pen tip). At this time, if there is a lightning symbol displayed, it means that the inside is charged, otherwise it is not charged. When using the two buttons do not press at the same time, so the measured results are not accurate, there is no reference significance.
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