Using this Diesel DZ2157 watch is easy. Just press the buttons on the side to set the time and other functions. It's simple enough for anyone to figure out. When it comes to wearing, make sure the silicone bracelet is adjusted to a comfortable tightness. For care, avoid exposing the watch to extreme temperatures and chemicals. If it gets dirty, you can use a soft, damp cloth to gently wipe the case and bracelet. Don't submerge it in water unless it's specifically waterproof. Also, keep it away from strong magnetic fields as they can affect the watch's accuracy. With proper use and care, this watch will serve you well for a long time.