Using the Bosch GLL 1 P is quite simple. First, insert the two AAA batteries that come with the tool. Then, decide on your mounting option. You can either use the versatile mount to attach it to a wall, use the compact tripod with the 1/4 - Inch - 20 thread, or just place it on a flat surface. Once it's set up, press the single button to turn on the laser. The bright single - laser line and point will help you with leveling and alignment. When using the tool, make sure the surface you're working on is stable to ensure accurate results. Also, don't look directly into the laser as it can be harmful to your eyes. For maintenance, keep the tool clean. You can use a soft, dry cloth to wipe it down after each use. Store it in a cool, dry place when not in use to extend its lifespan.