At a glance

The PRW-6600Y featuring barometer, altimeter, thermometer, digital compass, and Multiband 6 Waveceptor time keeping is one of the most desirable timepieces in the Pro Trek range. Powered by light, this PRO TREK model uses Casio's advanced SMART ACCESS system, which provides you with quick, intuitive access to all of the watch's key functions using an electronic crown.



12/24 Hour Format

Times can be displayed in either a 12-Hour or 24 Hour Format.

Alarm Function

5 Daily Alarms- each will sound every day at the time you set


Measuring range: –700 to 10,000 m; Measuring unit: 1 m; Hand indication of altitude differential; Manual memory measurements; Auto log data

Altitude Measurement to 10,000m: A built-in pressure sensor measures barometric pressure, which is converted to relative altitude up to a maximum 10,000m.

Altimeter Data Memory

Manual memory measurements (up to 30 records, each including altitude, date, time) Auto log data (High/low altitudes, cumulative ascent and descent)

Auto Calendar

Fully automatic calendar, with allowances made for leap years, pre-programmed to 2099

Band Material



A built-in pressure sensor measures barometric pressure, which is shown on the display.

A special sensor measures the air pressure (measuring range: 260/1100 hPa) and presents this on the display in the form of a symbol. This enables early detection of weather trends.

Battery Level Indicator

An indicator shows the current battery charge level.

Button Tones On/Off

tone on/off

Case/Bezel Material

Resin/Stainless steel

Countdown Timer

1/1s,60 M

Crown button lock

Secures the crown button from accidental change to another mode of operation.

Digital Compass

A built-in direction sensor detects magnetic north displaying both this and your current direction on the watch face.


(H x W x D)

51.6 x 51.5 x 13.4mm

Display Illumination

A luminous coating on the hands and index providing illumination in the dark.


Both the digital and analogue areas of the watch face glow when the EL backlight is turned on.

Hand Moving Function

With a push of a button, hands move away from the LCD to permit a free visibility of functions like the stopwatch or date.

Hand Shift Feature

The automatic hand adjustment function checks the home position of the hands every hour and corrects it if necessary - either by adjusting from shocks or using the influence of magnetism.

Height Gain

The height gain sums all the metres you have climbed in a session, so that you can see at a glance the total ascent on a tour.

LED Light


Auto light switch, selectable illumination duration, afterglow

Low Temperature Resistant

-10 °C

Mineral Glass

Hard glass resists scratching

Multiband 6 Radio Controlled

A built-in radio signal receiver ensures that the exact time is displayed across Europe, the US, Japan, and China.

Regular timekeeping

Analogue: 3 hands (hour, minute (hand moves every 10 seconds), second); Digital: Hour, minute, second, pm, month, date, day

Smart Access Technology

Smart Access makes it easy to operate multi-function watches. Simply pulling out and rotating the crown provides intuitive control over all functions

Solar Power

Tough Solar

A high-capacity solar-charging system harnesses the power of any light source for reliable watch operation with minimal impact to the environment.


1/100th Sec Stopwatch

24 hours


Measuring range: -10°C to 60°C (14°F to 140°F); measuring unit: 0.1°C (0.2°F)

Total weight

80 g

Tough Movement

Layers of light weight fine resin are incorporated into the Hybrid Mount Construction for excellent durability even when exposed to centrifugal gravtational forces up to 15G.

Water Resistant

100 Metre/10 Bar

10 Bar Water Resistant means that the watch is also suitable for swimming or snorkelling

World Time

Displays the current time in major cities and specific areas around the world.

29 time zones (29 cities + coordinated universal time), daylight saving on/off, auto daylight saving time (DST) switching, Home city/World time city swapping

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