high green laser pointer pens, professional lighting lazers Name:adjustable focus Green Laser Pointer Mode :GP-1800 Control of the smallest spot: ... :21*25*35cm G W:1.5kgTechnical Parameteradjustable focus, green dot facula, continuous output and working time over 5000 ... the military, medical and astronomy,indicator, teaching baton Hign power adjustable focus Green laser portable with key switch