Seiko A829 is a digital quartz alarm chronograph with a rotary switch. It features a time and calendar function, an alarm function (single and daily), a dual time function, a stopwatch function, a counter function (single and twin), a timer function, and an hourly time signal. The watch is water-resistant to 3 atmospheres (30 meters or 100 feet).

Here are some possible use cases for the Seiko A829:

• Time and calendar: Keep track of the time and date, and set alarms for important events.
• Alarm: Wake you up in the morning or remind you of appointments.
• Dual time: Keep track of the time in two different time zones, which is useful for travelers or those who have business contacts in different countries.