*Casio Men's GW400J-1 *G-Shock WaveCeptor Collection. *Atomic Timekeeping - The time is automatically set daily from time calibration radio signals. *Tough Solar Power - Powered by light, never need to change a battery. *Black dial. *Black Plastic resin case and strap. *Stainless steel case-back. *Thermometer. *Vibration Alarm. *Tide/Moon Graph. *Shock Resistant. *Water Resistant to 200m. *Auto EL Backlight. *World Time. *3 Alarms. *Countdown Timer. *Stopwatch. *Module 2931. *Case measures 46mm diameter by 15mm thick. *1 year original manufacturer warranty.