A green laser takes advantage of the biases of the human eye, meaning that you are able to see the light more clearly, even at greater distances than a red laser. This makes it an excellent addition to your tool kit, whether you're working in a bathroom or outdoors on a job site. To make this levelling laser even more versatile, it has a magnetic body & the capacity to be hung from a screw, or attached to separately available tripods via the integral threads. Supplied with a 2.0 Ah battery, that will provide Approx. 11 hours of runtime.