Using your Longines Spirit Zulu Time watch is a breeze. Just wind it up if it has stopped or give it a little shake to activate the automatic movement. Wear it on your wrist and enjoy the accurate timekeeping. When it comes to changing the strap or bracelet, use the Longines interchangeable system. It's very easy to operate. As for maintenance, keep your watch away from extreme temperatures and magnetic fields. Clean it regularly with a soft, dry cloth. If the watch gets wet, dry it thoroughly. Also, take it to an authorized Longines service center for a check - up every few years to ensure it stays in top condition.