Go bold. Explore the great outdoors! Get the PRO TREK PRG-601 featuring materials expected to reduce environmental impact and big bold index numbers. The digital compass, barometer/altimeter, and thermometer Triple Sensor helps you stay on top of changes in the natural environment, while Tough Solar converts light into the energy needed to power the watch. The raised index numbers on the dial are boldly balanced with a wide stainless steel bezel. The resin components used for the case, case back, and soft urethane band are made with bio-based resins produced using renewable organic resources such as castor oil plants and corn, helping to reduce the ecological footprint of this watch. Combining a simple watch aesthetic with the toughness of authentic outdoor gear, this timepiece has your back whether you’re in town or out in the wilderness. Basic Information Case size (L× W× H)51.6 × 51.5 × 14.8 mm Weight59 g Case and bezel material - Case / bezel material: Bio-based resin / Stainless steel Band - Soft urethane band (Bio-based resin) Water resistance100-meter water resistance Environmental resistance - Low-temperature resistant (-10°C/14°F) Time adjustment - Radio-controlled Watch; Multi band 6 Power supply and battery life - Tough Solar (Solar powered) Sensor feature - 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 h - Pa (7.65 to 32.45 in - Hg) Display unit: 1 h - Pa (0.05 in - Hg) 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 h - Pa and inHgDigital compass Measures and displays direction as one of 16 points Measuring range: 0 to 359° Measuring unit: 1° 60 seconds continuous measurement Graphic direction pointer Bidirectional calibration Magnetic declination correction Bearing memory - Thermometer Display range: -10 to 60°C (14 to 140°F) Display unit: 0.1°C (0.2°F) *Changeover between Celsius (°C) and Fahrenheit (°F) Exterior Glass - Mineral Glass Crown - Screw Lock Crown Compatible band size145 to 215 mm Other - Neobrite Watch Features World time29 time zones (29 cities + coordinated universal time), One-touch UTC Time Zone Access, daylight saving on/off, Home city/World time city swapping Stopwatch1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times Timer - Countdown timer Measuring unit: 1 second Countdown range: 60 minutes Countdown start time setting range: 1 second to 60 minutes (1-second increments, 1-minute increments) Alarm/hourly time signal5 daily alarms Hourly time signal Light - Double LED light LED light for the face (Full auto LED light, selectable illumination duration, afterglow) LED backlight for the digital display (Full auto LED light, selectable illumination duration, afterglow) Light colour - LED:White Calendar - Full auto-calendar (to year 2099) Mute feature - Button operation tone on/off Energy saving feature - Power Saving (display goes blank to save power when the watch is left in the dark) Battery display/alert - Battery level indicator Run time - Approx. battery operating time: 7 months on rechargeable battery (operation period with normal use without exposure to light after charge) 25 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Accuracy - Accuracy: ±15 seconds per month (with no signal calibration) Other features12/24-hour format - Hand shift feature - Regular timekeeping: Analog: 3 hands (hour, minute (hand moves every 10 seconds), second) Digital: Hour, minute, second, am/pm, date, day