Using the DeWalt DCK277D2 kit is easy. First, charge the batteries using the included charger. Once charged, insert the battery into either the drill/driver or the impact driver. For the drill/driver, adjust the torque and speed settings according to your task. Use the variable speed trigger for more precise control, especially on delicate surfaces. When using the impact driver, select the appropriate bit and insert it into the quick - release hex chuck. The LED light on both tools will help you work in dark or confined spaces. Just keep in mind that after you release the trigger, the light will stay on for 20 seconds. When you're done, store the tools in the contractor bag to keep them organized and protected. To maintain the kit, keep the tools clean and dry. Don't expose the batteries to extreme temperatures. If the tools get dirty, use a dry cloth to wipe them. Periodically check the batteries for any signs of damage. This will help your DeWalt DCK277D2 kit last a long time and perform at its best.