Led Pen

Led Pen
How can I use an LED light pen?

Sounds silly, but I have a LED light pen today, and when I try to use the LED light does not work. Does anyone have this problem? It sounds silly, but I have a LED light pen today, and when I try to use the LED light does not work. Does anyone have this problem? It has a button, but when pressed, does not work. It also has a laser, which also works, so it can not be that the battery is dead.



dead battery

Led Pen




Led Pen

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