Using the DeWalt DCS354B is easy. First, make sure you have a charged 20V MAX* battery (sold separately) and insert it into the tool. You can use the included wood - cutting blades or attach other compatible accessories via the universal accessory adapter. To change blades, use the Quick - Change™ system. Just follow the simple steps and you can swap them without any tools. When you start working, hold the tool with the DUAL - GRIP™ variable speed trigger. You can adjust the speed according to your project needs. The LED light will help you see clearly in dark areas. For accurate and consistent cuts, use the tool guide system to set the depth or height. As for maintenance, keep the tool clean after each use. Wipe it down with a dry cloth to remove dust and debris. Check the blades regularly for wear and tear, and replace them when necessary. Also, store the tool in a dry place. And remember, never use the tool if it's damaged. Have fun with your projects!