New Survivor 2 SX Series Chronograph Stopwatches for Professional, Affordable Timing-Great for Physical Education! The NEW SX Series work on the industry standard Watch Operating System (WOS 2.5). The NEW Survivor series have been redesigned in our NEW SX cases featuring: NEW Micro Switches NEW Magnum XL Display NEW 5 Year Battery NEW Breakaway LanyardThe NEW Survivor model is easy to use and a great low cost stopwatch for your basic timing needs.The NEW Survivor 2 SX series offer the following functions and features: Cumulative split only Split release action Timing range 24 hours NEW Micro Switches NEW Magnum XL Displays NEW 5 Year Batteries