A wristwatch is a timekeeping device worn on the wrist, typically secured with a strap or bracelet. It consists of a case that houses the movement, which can be mechanical or quartz, and a dial that displays the time. Wristwatches can also feature additional functions, such as calendars, alarms, and chronographs. Wristwatches come in various styles, materials, and designs, catering to different preferences and occasions. They can be made from metals like stainless steel or precious materials like gold, and may include features like water resistance. Popular brands include Rolex, Seiko, and Casio.