Mad Wave's STOPWATCH SW-500 memory is a digital stopwatch featuring memory and stroke/frequency measuring functions. The stopwatch will withstand accidental contact with water, such as raindrops, but is not designed to work in water. Do not press the buttons if the case of the stopwatch is wet. The stopwatch can measure up to 10 hours in 1/100 seconds. Up to 100/500 split times and lap times can be measured. Large-sized three-row display panel. Accumulated elapsed time / Lap time in progress, split time and lap time are displayed at the same time in separate rows, and they can be measured successively without releasing split or lap time measurement. Up to 100/500 measurements cab be stored in memory, and they can be recalled after measurement in over. Includes calendar, watch. CR2032 lithium battery. Water resistance – 3 bar. Do not use underwater. Features: Digital stopwatch with memory and stroke/frequency measuring functions. Water-resistant for accidental contact with water (raindrops), not intended for underwater use. Ability to measure up to 10 hours in 1/100 seconds. Capability to record up to 100/500 split times and lap times. Large-sized three-row display panel for clear visibility. Display of accumulated elapsed time, lap time in progress, split time, and lap time simultaneously in separate rows. Sequential measurement without releasing split or lap time tracking. Storage of up to 100/500 measurements in memory for later recall. Includes calendar and watch functions. Powered by a CR2032 lithium battery. Water resistance up to 3 bar. Caution: Not suitable for use underwater. Composition: Plastic - 100%