You have some frickin' sharks at your lair, and you're thinking "it would be really great if I could attach some lasers to them" and then you see these little laser diode modules: what great timing! These encapsulated laser diodes are Class IIIa 5mW, with a 650nm red wavelength. They can be driven from 2.8V to 5.2V so they're great for your embedded electronics project.This particular laser diode has a lens attached to turn the dot into a line. We think this would be particularly good for making a 3D scanner, but there are probably many other cool uses! Simply connect power to the red and black wires and you will be lasing in no time.The line beam spread is 120° - so from a distance of 5cm the line is 15cm long. The line fades out and doesn't have a sharp cut-off.Please note: this is not a laser pointer. It's a diode with integrated driver. You still need a 3 to 5VDC power supply. These diodes are 5mW output, and have a safety label marked on them. For more information on laser safety and ratings check out the Wikipedia page