Pro Trek PRW-6600YB-3ER Watch

The Watch
Make this exceptional timepiece from the renowned Pro Trek collection yours - and push past your limits. This new model will quickly become your most trusted adventure companion. Fully self-powered thanks to its solar energy system, it never needs a battery change. A wealth of features, all intuitively accessible, will transform the way you explore. The resin case measures 51.6 x 51.5 x 13.6 mm (length, width, thickness) and weighs 67 g, giving it a rugged, purposeful look. It features a mineral crystal encircled by a bezel engraved with city names - perfect for use with the world time function. On the case side, you'll find a crown at three o'clock along with four pushers distributed on the right and left. The caseback is secured with screws.

The Dial
This impressive model features a combination analog and digital dial. The hours are marked by luminescent Arabic numerals (courtesy of Neobrite technology) arranged around the dial's perimeter, alongside a minute track. Hours and minutes are indicated by baton hands coated in Neobrite, while a fine orange seconds hand sweeps the dial. Full Auto LED backlighting ensures readability in low-light conditions. The lower half of the dial displays multiple functions including the date and alarm. At ten o'clock, a subdial provides access to the barometer, altimeter, and thermometer functions. This Pro Trek is truly packed with possibilities.

Functions

Stopwatch Function - 1/100 sec - 24 h: Enables precise elapsed time measurement with the press of a button. The fraction indicates the unit of measurement, while the number indicates the maximum time that can be measured.

Countdown Timers - 1/1 min - 1 hour: For those who value precision: countdown timers alert you to important or recurring events with an audible signal at the programmed date and time. The timer can be set in minutes, up to a maximum of 1 hour in advance.

Daily Alarm: The daily alarm triggers every day at the time you set. The displayed value indicates the number of available daily alarms.

Full Auto LED Lighting: By tilting your wrist in low-light environments, a diode automatically illuminates the dial.

Cold Resistance (-10°C): This watch is also resistant to temperatures as low as -10°C.

Solar Power: Fully self-powered via eco-friendly solar cells. Any surplus solar energy is stored in a rechargeable battery.

Automatic time synchronization via radio-controlled signal reception (EU, USA, JPN, CHN):

Neobrite: The hands and/or indices feature a fluorescent coating that continues to glow in the dark after the watch has been exposed to a light source.

Compass: A built-in directional sensor detects magnetic north.

Barometer: Weather forecasts are provided by a dedicated sensor that measures atmospheric pressure (measuring range: 260/1100 hPa) and displays it on screen as a symbol.

Altimeter: A pressure sensor detects changes in atmospheric pressure and converts the result into an altitude reading, up to 10,000 m.

Cumulative Altitude: Depending on the model, the watch can store up to 40 altitude data blocks that can be reviewed at any time. Each data block includes the recorded altitude along with the date and time of the reading. In addition to the measured altitude, the altimeter also logs the maximum and minimum altitude of each measurement.

Altimeter Memory: Depending on the model, the watch can store up to 40 altitude data blocks that can be reviewed at any time. Each data block includes the recorded altitude along with the date and time of the reading. In addition to the measured altitude, the altimeter also logs the maximum and minimum altitude of each measurement.

Thermometer: A sensor measures the ambient temperature and displays it in degrees Celsius (-10°C /+60°C).

World Time Function: This function displays the time across 29 time zones and major cities around the world.

Automatic Hand Correction: The automatic hand correction checks the base position of the hands every hour and corrects it if needed - whether due to shock displacement or magnetic interference.

Key Beep On/Off: The key beep can be turned off using the mode button. Once disabled, no beep sounds when switching between functions. However, any programmed alarms or countdown timers remain active even after the key beep is turned off.

Hand Shift Function: This function moves the hands when they obstruct the display of the time, date, or stopwatch function.

Smart Access Technology: The Smart Access system lets you quickly and intuitively access all your watch's features using an electronic crown. To switch between modes or use functions such as the 1/20th-of-a-second stopwatch, countdown timer, alarm, or world time, simply press or rotate the crown.

Crown Button Lock: Locks the crown button to prevent any accidental mode changes.

Automatic Calendar: Once set, the automatic calendar always displays the correct date.

12/24-Hour Time Format: You can display the time in either 12-hour or 24-hour format.

Battery Level Indicator: Displays the current battery level.

The Strap
To complete this Pro Trek, Casio opted for a fabric strap that perfectly conforms to your wrist. It fastens with a pin buckle. Note that the lug width is specific to this collection.

Water Resistance
With a water resistance of 10 atmospheres - equivalent to 100 meters - this is a genuinely water-resistant watch. It's built for bathing, showering, and active swimming, but is not suitable for diving (professional or recreational) or high-pressure water cleaning. That said, one important note: the Ocarat watch team recommends keeping the crown and pushers dry during water activities to preserve the water resistance and protect the movement.