The 4x400 meter relay is a track and field event where four runners each complete a 400-meter lap. The race is run on an outdoor track, and each runner passes a baton to the next teammate. The goal is to finish the race in the shortest time possible. Each team is made up of four athletes, and the race typically takes place at the end of a meet. The 4x400 meter relay is known for its combination of speed and strategy, as teams must carefully plan their order of runners to maximize performance and minimize time lost during baton exchanges.