This Pro Trek is a high performance tool developed under the supervision of meteorologists to take on challenging environments. Like all triple sensor Pro Trek models, this watch features easy-one-tough 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. The 200 meter water resistance ensures strong durability for river trekking & rafting and the tide & moon graph/data delivers convenient information for sea kayaking and fishing.