Uploaded September 2019 | Updated September 2026, 16 hours ago
Go Harder with the Pro Trek F21.
Heart rate measurement & GPS, on a large LCD screen. Get data on your activity, making it even more enjoyable.
The WSD-F21HR is an outstanding smartwatch for efficient, effective fitness training, as well as mountain climbing and trekking. The heart rate monitor is great for pace management during activities such as road running, trail running and cycling.
■Heart rate monitor: This model is equipped with an optical sensor that measures heart rate by flashing LED light into the wrist. A new Heart Rate watch face automatically switches to the heart rate monitor screen when motion is detected by the accelerometer. The measured heart rate information is expressed as one of five heart rate zones, allowing the user to see at a glance the elapsed time and heart rate information.
■Activities: Running and Trail Running menus The displayed data (upper, middle, and lower sections of the screen) for road and trail running in the Activity app can be customized by the user. Information choices include heart rate, pace, and distance, and up to four screens can be set. The user can easily switch between the preset screens and check the desired information while engaged in the activity. Since a map and current location can also be shown, users can enjoy taking an unfamiliar route, or running when they are traveling away from home.
■Route import and data upload for greater device enjoyment: Since the WSD-F21HR can import GPS log data, the user can check running, trekking and cycling routes they or friends have used in the past. In addition, data measured by the Activity app is automatically saved to Google Drive, and activity history can be viewed on Google Calendar.
■Durable for broad outdoor applications: As with other PRO TREK Smart models, the WSD-F21HR is designed for outdoor use. It is water resistant to 50 meters and built tough enough to meet military standards.
■Design with a focus on outdoor sports: Featuring a front bezel that looks bold and sporty, the exterior design combines flexibility and durability. A soft urethane band and a double pin buckle ensure a very comfortable fit. The WSD-F21HR offers practical performance designed to delight everyone who loves outdoor sports.
GO HARDER WITH A WEARABLE MAP
Go Harder with the Pro Trek F21.
Heart rate measurement & GPS, on a large LCD screen. Get data on your activity, making it even more enjoyable.
The WSD-F21HR is an outstanding smartwatch for efficient, effective fitness training, as well as mountain climbing and trekking. The heart rate monitor is great for pace management during activities such as road running, trail running and cycling.
■Heart rate monitor: This model is equipped with an optical sensor that measures heart rate by flashing LED light into the wrist. A new Heart Rate watch face automatically switches to the heart rate monitor screen when motion is detected by the accelerometer. The measured heart rate information is expressed as one of five heart rate zones, allowing the user to see at a glance the elapsed time and heart rate information.
■Activities: Running and Trail Running menus The displayed data (upper, middle, and lower sections of the screen) for road and trail running in the Activity app can be customized by the user. Information choices include heart rate, pace, and distance, and up to four screens can be set. The user can easily switch between the preset screens and check the desired information while engaged in the activity. Since a map and current location can also be shown, users can enjoy taking an unfamiliar route, or running when they are traveling away from home.
■Route import and data upload for greater device enjoyment: Since the WSD-F21HR can import GPS log data, the user can check running, trekking and cycling routes they or friends have used in the past. In addition, data measured by the Activity app is automatically saved to Google Drive, and activity history can be viewed on Google Calendar.
■Durable for broad outdoor applications: As with other PRO TREK Smart models, the WSD-F21HR is designed for outdoor use. It is water resistant to 50 meters and built tough enough to meet military standards.
■Design with a focus on outdoor sports: Featuring a front bezel that looks bold and sporty, the exterior design combines flexibility and durability. A soft urethane band and a double pin buckle ensure a very comfortable fit. The WSD-F21HR offers practical performance designed to delight everyone who loves outdoor sports.
GO HARDER WITH A WEARABLE MAP
