Step Tracker, 100- meter water resistance, LED light, Step count, Step Count History Display, Step Goal Progress Display, Step Count Graph, Dual time Stopwatch, Countdown timer, 5 daily alarms, Hourly time signal, Full auto- calendar, 12/24- hour format, Button operation tone on/off, Approx. battery life: 3 years on CR2025 Quartz Movement Case Diameter: 44.2mm Water resistant to 30m (100ft): in general, withstands splashes or brief immersion in water, but not suitable for swimming or bathing