Using your Citizen NJ0170 - 83X watch is a breeze. Just wear it on your wrist like any other watch. The automatic movement means it keeps ticking as long as you're moving. To set the time and date, gently pull out the crown. Rotate it clockwise or counter - clockwise to adjust the time, and when you reach the right spot, push the crown back in. For the date, use the crown in a similar way. When it comes to care, avoid exposing your watch to extreme temperatures and magnetic fields. Keep it dry and wipe it with a soft cloth regularly to keep it looking shiny. If you want to clean it, use a mild soap and water, then dry it thoroughly. And remember, even though it's water - resistant up to 100 meters, don't wear it for deep - sea diving. This will help your watch stay in top shape for years to come.