Using the Milwaukee 2837 - 20 M18 FUEL 5 - inch Random Orbital Sander is easy. First, make sure the battery is fully charged and properly inserted. Then, select the appropriate speed mode according to the material you're sanding. Start from a lower speed for more delicate materials and higher speed for tougher ones. Hold the sander firmly with the ergonomic palm handle and start sanding in a smooth, circular motion. When using the VACLINK Bluetooth technology, pair it with the M18 FUEL PACKOUT 9 - gallon Dual - Battery Dust Extractor to keep the work area clean. As for maintenance, after each use, empty the dust bag and clean the sander. Check the battery regularly and store it in a cool, dry place. If you notice any issues with the sander, refer to the warranty for further assistance.