Using the Bosch PS21N pocket driver is easy. First, make sure you have a fully - charged battery (not included) and insert it into the tool. Then, select the appropriate bit for your job and insert it into the 1/4 - inch hex quick - change chuck. You can adjust the two - speed transmission based on your needs: use the 0 - 350 rpm setting for high - power tasks like driving large screws, and the 1,300 rpm setting for high - speed jobs. The 20 + 1 clutch settings let you fine - tune the torque, so you don't damage the fasteners. When working in the dark, just turn on the LED light. As for maintenance, after each use, wipe the tool clean with a dry cloth. Keep it in a dry place and don't expose it to extreme temperatures. Check the chuck regularly for any debris and clean it if necessary. And always store the battery properly according to the manufacturer's instructions.
