Pro Trek Smart WSD-F21HR Outdoor Smartwatch WIth Heart Rate Monitor. Our Smart line of outdoor watches are the perfect companion for all of your outdoor activities. With built-in GPS and full color mapping functionality, this watch offers tracking and navigating right on your wrist.

The first timepiece in the collection to offer and optical sensor that serves as a heart rate monitor for pace management and VO2 measurement during activities like road and trail running, cycling, climbing and more!

It also offers Casio's enhanced Activity App with menus that display measurement data in real time. The PRO TREK WSD-F21HR displays maps and the current location which enables users to enjoy taking an unfamiliar route. Designed for the active outdoors-man and training enthusiast, the PRO TREK WSD-F21HR boasts 50M water resistance, durability built to military specifications, a bold, durable front bezel, a soft urethane band with a double pin to ensure a comfortable fit and Casio's signature dual-layer display. Activities will never be the same again. And that goes for your lifestyle, too. Experience something new every day with PRO TREK Smart.

Out of stock


Klarna available


Standard Delivery in 2-4 working days-  £2.95 (Free for orders over £50)
Express Delivery in 1-2- working days- £5.00

Click & Collect

Going to be out? Have your delivery safely sent to a local store for collection


All of our products come with at least 2 years warranty



Mainland UK
Standard: 2-4 Business days after dispatch £2.95 (Free for orders over £50)
Express: 1-2 Business days after dispatch £5.00
(Express delivery only available for orders placed before 2.30pm – Excluding weekends & Bank Holidays)

Republic of Ireland & Channel Islands
Standard: 4-5 Business days after dispatch
Express: Not Available

Our nominated carrier is Parcel Force. Deliveries are made Monday – Friday between 9.00am – 6.00pm (excluding Bank Holidays).
If you require any further information relating to the Delivery service used, please call us at +44 (0)20 8208 9567.


If for any reason you change your mind or are not satisfied with your purchase, please return your purchase to Casio within 28 days of purchase. Please note that with the exception of faulty products, we cannot accept the return of items, which have been opened or used. This does not affect your statutory rights.

The below process should be followed:

1 - Complete the short form that accompanies your product. Please ensure that you complete all of the sections, as this will guarantee the timely processing of your return/exchange.

2 - Place your item in the original packaging along with the form. Please ensure that the product is pristine with all original manuals and tags.

3 - Send the box to us using a recorded/signed & trackable service to the address below. Please note, we cannot be held responsible for a package that has not been received by us.

4 - Return Address

Yusen Logistics Co Ltd
Casio Returns - Bay 32
Bradbourne Drive
Milton Keynes

Tel:+44(0)20 8208 9452
Email: collections@casio.co.uk

5 - Retain your tracking details, until you receive notification from Casio that your returned product has been safely received. Once received and processed, it may take up to 5-7 business days for your refund to be displayed on your payment card statement.