520nm Green pen build! (For 2of AAA dry cell) ## part 2.

[PPM Pen Pointer Maker]

1. Insert Complete.




2. Assemble anti dust cap. And tighten it.
Attaching button & LED indicator bar.


3.insert 2 x AAA dry cell. And close the battery cap.




4. Good. Perfact build.
It work very nice.