Casio Men's PRW3510Y-1 Triple Sensor Digital Quartz Resin Black Silicone Watch Imported Silicone Strap, Higher Visibility, Triple Sensor, Tough Solar Power, Multi-Band 6 Atomic Timekeeping, 200 Meter Water Resistant, Low Temperature Resistant(-10C/14F), Digital Compass w/Bearing Memory Altimeter, Barometer, Thermometer, Sunrise & Sunset Data, World Time, Full Auto EL Backlight w/ Afterglow, 4 Daily Alarms, 1/10 Sec. Stopwatch(1000Hr), Countdown Timer(24Hr), Power Saving Function Quartz Movement Case Diameter: 53.4mm Water Resistant To 200m (660ft): Suitable for all high impact water sports and scuba diving at depths not requiring helium gas. At these depths it is recommended to purchase a professional watch