Using your Tissot Seastar 1000 is easy. Just wear it like any other watch. When you're going for a swim or engaging in watersports, you don't have to worry as it's water - resistant up to 30 bar. To set the time, gently unscrew the crown, adjust the hands, and then screw the crown back down tightly. As for maintenance, keep it clean by wiping it with a soft, dry cloth regularly. Avoid exposing it to extreme temperatures and strong magnetic fields. If you notice any issues with the movement or water - resistance, it's best to take it to a professional watch repair service.