This PAG240-8 is the Pathfinder Pioneer series under Casio. It uses a steady black dial, powered by solar energy, and has a thermometer, air pressure value, altitude, and altitude mapping function. When it is close to the preset target height, it will be prompted. The watch can withstand a maximum temperature of - 10 ℃, a waterproof depth of 100 meters, and the power of the stopwatch. Meiyaxian