Using the DeWalt DW08802CG Green Cross Line Laser Level is a breeze. First, insert the included batteries. Then, you can use the magnetic bracket or the hang hole to mount the laser level wherever you need it. It can also be attached to a tripod using the 1/4' thread. Once mounted, turn it on and you're ready to get accurate cross - line projections up to 40 feet away. When using it, make sure to keep it away from extreme temperatures and direct sunlight. If it gets dirty, use a soft, dry cloth to clean the over - molded housing. Don't try to open the device on your own. Remember, it has a 1 - meter drop rating, but still handle it with care to avoid any damage. And if you have any issues, you're covered by a 3 - year limited warranty, a 1 - year free service contract, and a 90 - day money - back guarantee.