Using the BNR1841 Drywall Sander is easy. First, connect the sander to a standard vacuum hose or attach the included vacuum bag with a strap. This will help keep your workspace dust - free. Then, choose the appropriate SDR7 7 - inch sanding disc for your task. When you start sanding, hold the sander firmly with the side handle and turn it on using the switch. You can adjust the halo light on the rear of the handle to improve visibility. For best results, move the sander in a smooth and even motion across the drywall or plaster surface. As you work, keep an eye on the dust collection system. If using the vacuum bag, empty it when it gets full. When you're done, turn off the sander and unplug it. Clean the sander regularly to maintain its performance. Wipe the exterior with a dry cloth and check the sanding discs for wear and tear. Replace them if they are damaged. Store the sander in a dry and safe place. Remember, this sander is designed for drywall and plaster surfaces, so don't use it on other materials. Also, always wear safety goggles and a dust mask to protect yourself from dust and debris.