Get off the beaten path and go beyond, with the lightest* PRO TREK yet, the perfect companion for long trails and ultralight hikes. The PRJ-B001 takes it up a notch with the first rotary guard bezel in the PRO TREK line. Turn the rotating bezel to switch between two distinct styles. When set to present a stylish angular design that complements everyday fashion, the bezel covers the buttons, preventing accidental pressing of buttons while out walking or in town. Turn the bezel 45 degrees to the rounder look and uncover the buttons for easy access to functionality while out hiking or training. The watch features a soft urethane band for stress-free wear even over long stretches of hiking. In charcoal gray or off white to coordinate beautifully with nature, with touches of fluorescent color in the numbers and bezel, this timepiece is designed to complement outdoor fashions. Key resin components used in the case, band, and other parts are made with bio-based resin, a material expected to help reduce environmental impact. Far beyond just ease and style, this watch offers superior functionality, too, with Tough Solar charging and Bluetooth to pair with a smartphone. Press a button on the watch to record date, time, and position on a map within the app, a useful way to log your activity. Reminisce about the breathtaking places you’ve been, and take note of places you want to go again. The lightest PRO TREK yet charts your course to all-new ways of appreciating the great outdoors. Basic Information Case size (L× W× H)50.3 × 46 × 13.6 mm Weight44 g Case and bezel material - Case / bezel material: Resin / Bio-based Resin Band - Bio-based resin band Water resistance100-meter water resistance Environmental resistance - Low-temperature resistant (-10°C/14°F) Time adjustment - Bluetooth: Connects to a smartphone and automatically adjusts the time Power supply and battery life - Tough Solar (Solar powered) Exterior Glass - Mineral Glass Other - Neobrite Compatible band size145 to 215 mm Watch Features World time - Home Time/World Time swapping Sunrise/sunset display - Sunrise, sunset time display Sunrise time and sunset time for specific date, daylight pointers Stopwatch1/10-second stopwatch Measuring capacity: 999:59'59.9'' Measuring modes: Elapsed time, split time, 1st-2nd place times Timer - Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments) Alarm/hourly time signal5 daily alarms (with 1 snooze alarm)Hourly time signal Light - Double LED light LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), 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) 18 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 features - Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)12/24-hour format - Day display (days of the week selectable in six languages)Regular timekeeping: Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode) Digital: Hour, minute, second, pm, month, date, day