CASIO PRO TREK – Outdoor- und Trekking-Uhren für Profis




With the PRO TREK WSD-F21HR you can fully concentrate on your sporting activities - the clever Smartwatch takes care of the rest. The rugged outdoor watch is ideal for trail running, trekking and cycling, and thanks to GPS, colored offline maps, a heart rate monitor and many practical apps and functions, it gets you quickly to your destination.





Full-Color Map

Full-Color Map

The WSD-F21 provides map data from OpenStreetMap as well as running and walking routes from Mapbox. This data can be used without a mobile phone or Internet connection — simply download a full-colour map before you begin your activity. This means that your location can also be determined when the watch is offline. There is a wide range of different map designs to choose from, such as topographic maps, maps for water sports enthusiasts etc. You can also use the Location Memory function to manually add a marker to specific locations, e.g. a good fishing spot.



Leave your smartphone at home! This smartwatch is equipped with the Wear OS by Google operating system and features integrated GPS technology, allowing it to operate completely independently from your mobile phone. The smartwatch's GPS enables you to determine your location and trace the route you've travelled.

Heart rate measurement

Heart rate measurement

An optical sensor on the case back of the watch measures the heart rate on the wrist by means of an LED. The measured values are displayed on the watch. Use these data for your training, be it to control the pace of your activity or to increase your endurance. In addition to your current heart rate and the maximum and minimum heart rate per day, it shows your training intensity in the form of a heart rate zone over five different levels.

Point navigation

Point navigation

Find your way quickly and easily: Once you have specified your destination, the distance to your location and direction will be displayed on the map.

Display with two levels

Display with two levels

The watch has a generous 1.32-inch display. You can easily switch between the colour LCD and the monochrome LCD. In this way the power consumption can be kept low. and guarantee good legibility. You can configure up to four different measurement screens according to your taste and requirements.

Robust according to military standard

Robust according to military standard

The Smart Outdoor Watch is particularly shock and vibration resistant, as it meets the extreme demands placed on military equipment. This is even certified (US military specification MIL-STD-810G).



Charging cable 1703-004A


Cable holder WSA-H1


Recommended Apps

GPS app for hiking


This is a GPS app for outdoor adventurers providing route information, navigation guidance, location data and distance to next waypoint all at a glance.

App by Augmentra Ltd.

Cycling App


Bikemap contains more than 3.4 million cycling routes in more than 80 countries around the world. Discover the most beautiful cycling regions for your next bike ride close to home or further afield. You also receive useful information for each cycling route, such as the length of the route, an interactive altitude profile and the location of toilets, repair stations and cash points. Thousands of exciting new cycle routes are added every day by the active Bikemap community.

App by Bikemap GmbH.

Fishing app


Fishbrain is the world's largest community-based fishing app. Join other anglers in your area and contribute to the worlds smartest local fishing forecasts.

App by FishBrain.

Golf app


Hole19 is one of the most comprehensive Android golf assistants and the Wear OS by Google extension provides distance details for more than 41,000 courses around the world. The app itself is extremely in-depth, but as getting your phone out on the course is a big no-no, you'll be better off making use of the distance scoring features on your smartwatch.

App by Stat Track Technologies Lda.

Fitness app

Exercise Timer

Exercise timer is the ultimate fitness APP for any of your gym or home workouts. Whether you need to perform TABATA, HIIT or any other style, this is your perfect interval timer.

App by NeuroneDigital.

Fitness app 

Zombies, Run!

Get ready for the run of your life. Join 5 million runners on an epic adventure! Zombies, Run! is an ultra-immersive running game and audio adventure.

App by Six to Start.

Ski app

Ski Tracks

Designed specifically for winter sports, the award-winning Ski Tracks is your worldwide, ultimate ski companion. Record your entire day on the slopes.

App by Core Corders Ltd.

Horseback riding app


Equilab is the horse app for all riders that want to follow up on their horse training and equestrian results It automatically tracks your horse movements. Manage your stable, horses, pony and co-riders, all in one place!

App by Schvung Ride AB.

Weather app


This real-time weather app shows local animated weather maps, helping the user to easily and quickly track weather changes nearby.

App by ACME AtronOmatic, LLC.

Functions WSD-F21HR-BKAGE


Water Resistance 50 meters*¹
Environmental Durability MIL-STD-810 (United States Military Standards issued by the U.S. Department of Defense) *²
Display 1.32-inch dual layer display
Color TFT LCD and monochrome LCD
Color: 320×300 pixels
Touchscreen Capacitive touchscreen (anti-fouling coating)
GPS Compatible (including GLONASS and MICHIBIKI (QZSS))
Color Maps Compatible (supports offline use)
Sensors Pressure (air pressure, altitude) sensor, accelerometer, gyrometer, compass (magnetic) sensor, optical sensor (PPG Heart Rate)
Microphone Yes
Vibrator Yes
Wireless Connectivity Bluetooth® V4.2 (Low Energy)
Wi-Fi (IEEE 802.11 b/g/n)
Buttons MAP button, Power button, APP button
Battery Lithium-ion battery
Charging Method Magnetic charging terminal
Recharging Time Approx. 2.5 hours at room temperature
Battery Life (When GPS Not in Use) Normal use (color display): 1.5 days, roughly
Multi Timepiece Mode (timekeeping and sensors only)*³: 1 month, roughly
(Varies according to use)
Size of Case Approx. 61.7mm×57.7mm×16.8mm (H×W×D)*4
Weight Approx. 81g (including wristband)
OS Wear OS by Google
Operating Environment Wear OS by Google works with phones running Android 4.4+ (excluding Go edition) or iOS 10 or later.
Supported features may vary between platforms and countries.
  • * 1 Based on in-house test by CASIO.
  • * 2 Nine items tested under military specification MIL-STD-810G at National Technical Systems:
  • • Shock: Tested to meet MIL-STD-810G Method 516.7 Procedure IV. • Vibration: Tested to meet MIL-STD-810G Method 514.7 Procedure I. • Humidity: Tested to meet MIL-STD-810G Method 507.6 Procedure II. •Solar radiation: Tested to meet MIL-STD-810G Method 505.6 Procedure II. • Low pressure transport: Tested to meet MIL-STD-810G Method 500.6 Procedure I. • Low pressure operation: Tested to meet MIL-STD-810G Method 500.6 Procedure II. • Low temperature transport: Tested to meet MIL-STD-810G Method 502.6 Procedure I. • Temperature shock: Tested to meet MIL-STD-810G Method 503.6 Procedure I-C.
    • Ice accretion: Tested to meet MIL-STD-810G Method 521.4 Procedure I.
    (The device has been tested to perform under test conditions, but is not guaranteed to operate under all conditions in actual use. Not guaranteed against damage or accidents.)
  • *3 Wear OS by Google disabled. Battery life may vary depending on use of sensors.
  • *4 19.1 mm in depth including the optical sensor

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