With LED and beepsound in Use a pen holder, and the part of the pen is wrappedwith a rubber sleeve to accidental and short circuit The circuit design is reasonable, regardless of the positive and poles, the positive and polescanbe connectedfreely The pen tip can be removed, thewire is in use, it is easy to connect Just connect to the two poles of the capacitor, Manufacturer: Ruarby
With LED and beepsound in Use a pen holder, and the part of the pen is wrappedwith a rubber sleeve to accidental and short circuit The circuit design is reasonable, regardless of the positive and poles, the positive and polescanbe connectedfreely The pen tip can be removed, thewire is in use, it is easy to connect Just connect to the two poles of the capacitor, Manufacturer: Ruarby
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