Using your Milwaukee 2402-20 M12 FUEL 1/4 Hex 2-Speed Screwdriver is easy. First, make sure the battery is fully charged. You can check the on - board fuel gauge. To start, simply press the trigger. Use the two - speed settings to match the task at hand. For lighter jobs, choose the lower speed, and for tougher tasks, switch to the higher speed. When using it, keep a firm grip on the tool. Make sure the bit is properly inserted into the 1/4 hex chuck. As for maintenance, after each use, wipe down the tool with a clean, dry cloth. Store it in a cool, dry place. Don't expose it to extreme temperatures. Also, periodically check the battery contacts for any dirt or corrosion. If you notice any issues with the performance of the tool, such as loss of power or strange noises, stop using it and contact Milwaukee's customer service for assistance.