I do not know if it is marked but there is a pen imitation, no ability to write with. The laser works well, it is not extremely powerful but for me that's enough, over the fact that it is powered by a battery type LR03 (batteries remote controls) is a huge advantage over most lasers of this type that operate with more batteries that cost quite expensive. To see what happens over time but for now I am very satisfied with this product. Fast shipping more than honest price, so I attributed this product 5 stars.
