Seiko is known for its convenience technology and precision. Seiko produces a range of accurate, stylish watches with caliber number 7T04 for every occasion, maintaining the original reputation for excellence and reliability for men and women. In fact, the accuracy of Seiko has led to the brand being the official timekeeper for various professional sports events. Seiko Chronograph is a specific series of watches which can be used as a stopwatch along with a display watch. A fundamental chronograph features an independent sweep second hand; it is usually started, stopped, and returned to zero by successive pressure on the button. Less simple chronographs use advanced features and may also have multiple independent hands to determine seconds, minutes, hours, and in many cases tenths of a second.