- 1 decade agoFavorite Answer
Since there is no way to buy in 屯門
and I buy in 鴨寮街 $400 <50mW wave lenght 523 nm use 2 AAA batteries Class lllb PROUCT(Keep this away from children
you can see a clear laser beam at night and you can point at star
you must ask the shop keeper, because they will not put the laser out.
the place I buy have a cheaper one you can't see a laser beam at night or day.
If you went a stronger one cost >$1000