The Pro Trek Tough Solar Digital Watch was developed with the help of meteorologists to take on challenging environments. Casio's Triple Sensor Features - an altimeter and barometer, a thermometer and a digital compass - are accessed using easy one-touch buttons. Barometric pressure readings are converted to numerical and trend graph data for you, to better interpret patterns. A reconfigured duplex LCD layout provides optimal upper and lower layout. Tide graph and moon data help you choose the best times to hunt and fish. Uses Multi-Band 6 Atomic Timekeeping with time calibration radio signals updated automatically up to six times per day or manually upon request. The Tough Solar Power battery lasts up to 23 months with no exposure to light and can even charge on artificial light if necessary. Water-resistant to 200 meters. Imported. Case dia: 50.6mm.