Introducing the new Pro Trek Prw-2500R, a high performance tool developed under the supervision of meteorologists to take on challenging environments. Like all triple sensor Pro Trek models, the Prw-2500R features easy-one-touch operation of its Altimeter/Barometer, Compass and Thermometer. A reconfigured duplex LCD layout provides optimal upper & lower LCD layout for information at-a-glance when you're on the go. In addition to numerical and trend graph data, unique arrow icons help to indicate characteristic barometric pressure patterns. 200 meter water resistance has also been employed to ensure strong water resistance for river trekking & rafting where one would encounter strong water pressure. The addition of tide & moon graph/data provides convenient information for sea kayaking and fishing. Black resin band digital watch with neutral face. Tough solar power Multi-band 6 atomic timekeeping 200 meter water resistance (660 feet) Triple sensor Dual layered LCD Low temperature resistant (-10C/14F) Digital compass Altimeter Barometer Thermometer Tide and moon graph/data World time (48 cities) Full auto EL-backlight with afterglow 5 daily alarms 1/100 second stopwatch Countdown timer 12/24 hour formats Power saving function Casio Tough Solar watches are battery powered. The battery is recharged by a solar panel built into the face of the watch. Depending on the model, a Casio Tough Solar watch can stay fully functional anywhere from 5-23 months without exposure to any light. Casio Tough Solar watches can be recharged with any type of light, but recharging times will vary according to the light-source.