YS Electronic Stopwatch Timer Track And Field Training Running Watch, Style:, YS-810 10 Memories (Black), YS-830 30 Memories (Black), YS-860 60 Memories (Black), YS-8100 100 Memories (Black), YS-810 10 Memories (White), YS-830 30 Memories (White)

1. Button design, comfortable and not stuck, reinforced, durable
2. Waterproof for life, waterproof against rain and sweat, just wipe it dry after use
3. Can be turned off, the clock does not need to be reset, save energy
4. Function: stopwatch, clock, calendar, countdown, alarm clock, metronome, shutdown, mute
5. Power supply: contains a CR2032 button battery
6. Material: ABS
7. Screen size: about 3.5x2.3 cm
8. Overall size: about 7.5x6.2x2.1 cm
9. Weight: about 65 grams