Blue lasers are the cutting-edge of consumer laser pointers, and this is a fun one. The special lens that caps this laser pointer diffuses the laser beam into patterns that can be adjusted by twisting the lens. If you want to use it like a regular laser pointer, just unscrew the cap.
Please note, because the human eye is more sensitive to green than to blue, this laser pointer will appear less bright than a similar green one. However, the milliwatt output is factory-calibrated (click here for further information)