Using your Emporio Armani AR11412 Nicola Chronograph is easy. Just set the time and date as you would with any regular watch. The stopwatch function can be used to time events by pressing the side buttons. For daily wear, you don't have to worry about light splashes thanks to its 50 - meter water resistance, but avoid submerging it in water for long periods. When it comes to maintenance, keep it clean by wiping it with a soft, dry cloth regularly. Avoid exposing it to extreme temperatures or harsh chemicals, as these can damage the watch's components. If you need to replace the battery, it's best to take it to a professional watchmaker to ensure proper installation.