Casio Pro Trek

The Casio PRO TREK PRJ-B001-1 is an ultralight, solar-powered trail watch built for real use, not pretend “outdoor lifestyle” marketing. At around 37 grams, it’s one of the lightest PRO TREK models ever and wears comfortably all day. The new rotating guard bezel is both style and function — turn it one way and it shields the buttons for daily wear; turn it the other way and the pushers are exposed for hiking, timing, and logging key moments on the trail. The case and band use bio-based resin, it’s 100m water resistant, and the high-contrast analog hands plus backlit digital display stay readable in low light.

Band: Resin band
Length: 145-215mm/23.0mm
Case size: 50.3×46.0×13.6mm
Mass: 44g
Tough solar (solar charging system)
10 ATM waterproof function
Mobile link function (function linked via Bluetooth (R) communication with compatible mobile phones)
Hand retraction function (If the hands overlap the LCD display and are difficult to see, you can temporarily retract the hands from above the LCD display.)
World Time: 38 cities around the world (38 time zones, automatic summer time setting function) + UTC (Coordinated Universal Time) time display, home time city switching function
Stopwatch (1/100 second (less than 1 hour)/1 second (more than 1 hour), 24 hour meter, with lap/split)
Timer (set unit: 1 second, maximum set: 60 minutes, measured in 1 second increments)
5 time alarms/time signal
Battery indicator display
Power saving function (turns off the display after a certain period of time in a dark place to save power)
Full auto calendar
12/24 hour display switching
Low temperature resistant specifications (-10℃)
Operation sound ON/OFF switching function
Day of the week display (switchable in 6 languages: English, Spanish, French, German, Italian, and Russian)
Double LED light: LED light for dial (with super illuminator, afterglow function, afterglow time switching (1.5 seconds/3 seconds)), LED backlight for LCD section (super illuminator, afterglow function, afterglow time switching (1.5 seconds)) seconds/3 seconds))