Unscrew the two points (as in picture) placed on the laser box cover and replace the three 1.5V size AA batteries; pay always attention to the battery polarity ; close the cover fixing the screws supplied.
Unscrew the two points (as in picture) placedon the laser box cover and replace the three1.5V size AA batteries; pay always attention tothe battery polarity ; close the cover fixing thescrews supplied.