Using the DeWalt DCF888D2 Impact Driver Kit is easy. First, make sure the batteries are fully charged using the included charger. Insert the battery into the tool. To start using the tool, select the appropriate speed setting based on your task. For precise work, use the Precision Drive™ in speed 1. You can insert 1' bit tips into the one - handed loading 1/4' hex chuck. To pair the tool with the Tool Connect™ app, hold down the pair button on the tool foot for 3 - 5 seconds. Once paired, you can track the tool's location, customize its settings, and get diagnostics. When it comes to maintenance, keep the tool clean and dry. Avoid using it in wet or dusty environments as much as possible. Check the internal coin cell battery periodically, and replace it when needed. Store the tool in the included kit box to protect it from damage. Also, be aware of the 'disable when out of range' feature. Set it up to prevent unauthorized use or theft of the tool. Remember, the battery has a lifespan of 3 years, so keep an eye on its performance over time.