Red and green laser pointers Up to 3 mW at 635 nm and 4 mW at 532 nm Lightweight and compact Easily stored in pocket shirt These compact handheld laser pointers are ideal for presentations and lectures. They fit easily into a shirt pocket and yet produce up to 4 mW in a well-collimated beam. The output wavelengths are 532 nm and 635 nm respectively for the green and red laser pointers. They come in a storage case and include two AAA size batteries. 18 LAB 191 and 18 LAB 194 do not meet the European standards for CE certification and therefore should not be purchased for use within the European Economic Area (EEA).