Using your Bosch GWS18V-45CN angle grinder is straightforward. First, if you're using the connected feature, pair the optional Bosch GCY30 - 4 Bluetooth connectivity module with the free Bosch Toolbox app on your phone. Then, insert the battery (sold separately). Before starting, make sure the wheel guard is properly installed. When you're ready to start grinding or cutting, hold the tool firmly with the two - position Vibration Control side handle. Use the sliding switch to turn it on. Thanks to the soft - start technology, it'll ease into the cut smoothly. When you're done, turn off the grinder and let it cool down. As for safety, always wear appropriate safety gear like goggles and gloves. Avoid using the tool in wet conditions. The drop control is there to protect you if you accidentally drop the grinder. The restart protection helps prevent it from starting up unexpectedly when you insert the battery. For maintenance, keep the tool clean after each use. Wipe it down with a dry cloth. Periodically check the spindle lock and other moving parts for any signs of wear. If you have any issues, refer to the Bosch support or the user manual that comes with the tool.