Stopwatch with 100 memories, clock and calendar. Records turrets with a unit of up to 1/100 seconds. It can quickly access memory from the last recorded time. For running, LIFO (last-in-first-out) and FIFO (first-in-first-out) can be used. It has the ability to measure the pulse to prevent possible inconvenience. Water resistant and shocks. Adjustable neckband.