A diver's watch is a timepiece specifically designed for underwater activities, particularly scuba diving. These watches are built to withstand high water pressure and are typically water-resistant to at least 200 meters. They often feature a unidirectional rotating bezel, which allows divers to track elapsed time underwater safely. In addition to their durability, diver's watches usually have luminous hands and markers for visibility in low-light conditions. Many models also include features like a helium escape valve, which helps prevent damage during deep dives. Overall, diver's watches combine functionality with style, making them popular among both divers and watch enthusiasts.