Casio PRO TREK PRG-240-1 Technology: Equipped with Tough Solar charging system, can be charged by light. Sensors: Built-in triple sensor for measuring altitude, atmospheric pressure, temperature, and digital compass function. Waterproof: Features 100-meter water resistance. Other functions: Includes world time, sunrise/sunset time display, stopwatch, countdown timer, 5 daily alarms, and full auto calendar functions.
