191004_WSDF21HR_30sec | GO HARDER WITH A WEARABLE MAP Have you already tested the new PRO TREK Smart WSD-F21HR? WSD-F21HR has a newly developed optical heat rate monitor... | By CASIO PRO TREK
![Casio "Pro Trek" Outdoor Heart-Rate Monitor GPS Sports Watch (Model WSD- F21HR-BKAGU) (BLACK) - Walmart.com Casio "Pro Trek" Outdoor Heart-Rate Monitor GPS Sports Watch (Model WSD- F21HR-BKAGU) (BLACK) - Walmart.com](https://i5.walmartimages.com/asr/c03dc10a-60cb-4228-9bb9-40c988b25b18_1.63d640dd3bfed014029f1df7e3c71696.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
Casio "Pro Trek" Outdoor Heart-Rate Monitor GPS Sports Watch (Model WSD- F21HR-BKAGU) (BLACK) - Walmart.com
![Got this Casio Pro Trek WSD-F21HR. WearOS, mil-spec durability, heart rate + other sensors useful in outdoors activities and most importantly dual layer screen that can show just the time, reputedly for Got this Casio Pro Trek WSD-F21HR. WearOS, mil-spec durability, heart rate + other sensors useful in outdoors activities and most importantly dual layer screen that can show just the time, reputedly for](https://external-preview.redd.it/T1jIqAjcSJvW_hJRUfFPuLqk8BQ4ZadWhKLGAlGmghU.jpg?auto=webp&s=3bb4fa1b4252e58ae2d62677df78a80994b6a20a)