وولٹیج کا پتہ لگانے والے قلم کے لیمپ فنکشن کو کیسے آن کیا جائے؟
Press the "light switch" button, the test pen will turn on or off the light. In the power-on state, when the test pen is turned off, the light goes out synchronously, and in the power-off state, the light goes out automatically after about 5 minutes.
