Using the DeWalt DCK249E1M1 kit is easy. First, charge the batteries fully using the provided charger. For the hammer drill/driver, choose the right drill bit or screwdriver bit for your job. Adjust the speed and torque settings according to the material you're working on. When using the impact driver, insert the appropriate bit and use the variable 3 - speed trigger to control the power. Both tools have LED lights, so you can turn them on in dark areas. Remember to use the belt clips to keep the tools handy. When you're done, store the tools in the contractor bag. For maintenance, keep the tools clean and dry. Regularly check the batteries for any signs of damage. If you're using the Tool Connect™ feature, make sure to install the chip (sold separately) correctly and connect it to the app for easy management. Also, don't forget that this kit comes with a 3 - year limited warranty, so if you have any issues, you're covered.