Using the DeWalt DWHT35625S Tape Measure is easy. First, pull out the blade to the length you need for your measurement. When you're working in low - light areas, press the button to turn on the powerful LED light. It'll help you see the measurements clearly. Remember, this tape measure has an auto - shutoff feature that kicks in after 60 seconds of inactivity to save battery. You can charge it quickly using the Micro - USB port. Just connect it to a power source, and you'll be ready to go in no time. As for maintenance, keep it clean and dry. Avoid dropping it from heights greater than 100 feet, as the housing is designed to withstand a 100 - foot drop, but a higher fall could damage it. If you're not using it for a long time, make sure to store it in a cool, dry place. That way, your tape measure will last you a long time and keep performing at its best.