The Casio PRO TREK PRG-270-1ER is a multifunctional outdoor watch equipped with Casio's Triple Sensor Version 3 technology, offering precise measurements of direction, atmospheric pressure, altitude, and temperature. It features Tough Solar power for reliable operation and is resistant to low temperatures down to -10°C. The watch includes a digital compass, barometer, altimeter, thermometer, sunrise and sunset times, world time, stopwatch, countdown timer, and five daily alarms. The PRG-270-1ER has a resin case and band, mineral glass, and is water-resistant up to 100 meters. Reference number: PRG-270-1ER.