Using this dial caliper is a breeze. Just open the carrying case, take out the caliper, and turn it on if it's battery - operated. To measure an object, gently place the jaws of the caliper around the item you want to measure and read the measurement on the digital display. Make sure to handle the caliper carefully to avoid any damage. Keep it in a dry place when not in use. If the battery runs out, replace it with a new one of the same type. This will ensure your caliper stays in good working condition for a long time.