This men's leather strap mechanical watch is a great addition to your daily wear. To use it, simply adjust the buckle to fit your wrist. The automatic self - winding movement means it will keep ticking as long as you wear it regularly. For the auto - date feature, it will update itself at midnight. When it comes to water resistance, it can handle splashes and brief submersion, but don't wear it for long - term swimming or diving. To maintain it, wipe the watch with a soft cloth regularly to keep it clean. Avoid exposing it to extreme temperatures or strong magnetic fields. The leather strap may need occasional conditioning to keep it soft and supple. And if you're not using the watch for a long time, store it in its paper box to protect it from dust and scratches.