Casio PRG340-1 Pro Trek men's digital watch features a 52mm wide and 15mm thick black bio-based resin case with a bidirectional rotating bezel and textured function pushers. Casio PRG340-1 has tough solar powered Japanese quartz movement. This stylish watch also features a solid grey digital dial with Arabic numeral hour markers along with the low-temperature resistant (-10?/14?), altimeter, measuring range: -700 to 10,000 m (-2,300 to 32,800 ft.), measuring unit: 1 m (5 ft.), manual memory measurements (up to 30 records, each including altitude, date, time), auto log data (high/low altitudes, auto cumulative ascent and descent); trek log data (up to 14 records of high/low altitudes, auto cumulative ascent and descent of particular treks), others: relative altitude readings (-3,000 to 3,000 m); selectable measurement interval: 5 seconds or 2 minutes, *1 second for first 3 minutes only, *changeover between meters (m) and feet (ft), barometer, display range: 260 to 1,100 hpa (7.65 to 32.45 inhg), display unit: 1 hpa (0.05 inhg), atmospheric pressure tendency graph (past 42 hours of readings), atmospheric pressure differential graphic, barometric pressure tendency information alarm (beep and arrow indicate significant changes in pressure), *changeover between hpa and inhg, digital compass, measures and displays direction as one of 16 points, measuring range: 0 to 359