3 uses (white LED, blue LED and laser). Remember to remove the batteries before use (which are protected from contact by a small pellet of cardboard to take off, here). I just was looking for the use laser, and it's perfect to entertain my 2 cats, one year old and 3 years .. like crazy .. they look the beast everywhere (even when it's finished playing) do .. careful if painted curtains or paper. The red laser is visible day unless very high brightness (sunlight). Do not leave in the hands of children.