But as soon as you’ve done that, you’ve got a 1,000-mW laser at your command. To put that in perspective, if a hand-held laser pointer makes 1 mW in many jurisdictions, it’s illegal, because people have used them to blind airplane pilots and cause all sorts of chaos. The LaserCube is a Class 4 laser – the highest the safety classes go – meaning it can instantly burn skin and eyeballs, among other things. The Nominal Ocular Hazard Distance – the distance from which a 1,000-mW laser can damage your eye in less than a quarter of a second – is 733 ft (224 m) away. You can even hurt yourself looking at the point where the laser hits the wood as you’re etching it, it’s so bright.