Item Type: Sports Stopwatch_x000D_ Weight: 152g/5.4oz_x000D_ Material: ABS_x000D_ Battery: AG13 button battery 40mah (shipped with built in battery)_x000D_ Uses: Special sports stopwatch, multi function stopwatch, match referee timer. 1Multi Functional Design: It can meet the timing needs of various sports competitions, such as running, swimming, basketball, etc. 2Ensure Accuracy: High accuracy performance, stopwatch accurate to the millisecond level, to ensure the accuracy of the race timing, very suitable for competition use. 3Easy to Use: Easy to use operation interface, so that the referee can easily control the process of the game, to ensure the normal progress of the game. 4Durable and Reliable Design: Waterproof and shock proof, suitable for use in a variety of harsh environments, very suitable for outdoor competition venues. 5With a Variety of Additional Functions: Such as compass, alarm clock, etc., to provide more practical, is the ideal choice for you to buy a race timer.3 x Multifunctional Stopwatch