CASIO Pro Trek PRW-6900YB-3 Grey Dial Solar Watch 100m 44.80mm

Rugged Solar Watch for Outdoor Use

The Casio Pro Trek PRW-6900YB-3 is a solar-powered sports watch built for men who need reliable timekeeping and environmental data on the trail. Its bio-based resin case and Cordura fabric strap withstand rough handling, while 100m water resistance supports swimming and surface water sports. The analogue-digital display shows world time, date, and triple-sensor readings for compass, altimeter, and barometer functions. Tough Solar charging keeps the movement running without battery changes during extended trips.

Simple Strap Adjustment and Solar Setup

The buckle clasp on the fabric strap allows quick length adjustment without tools, and the screw-down crown secures the case against water ingress when tightened properly. Solar charging begins automatically under light; a full charge takes several hours in direct sun but works indoors at reduced speed. The only common issue is forgetting to pull the crown out before pressing buttons, which locks the settings until the crown is pushed back in and screwed down again.

Suited for Hikers and Field Workers

This model suits hikers, campers, and outdoor professionals who want ABC sensor data and solar reliability in a single wrist unit. Buyers who need smartwatch notifications, heart-rate tracking, or GPS navigation should look elsewhere, as the watch lacks wireless connectivity and health sensors. It also does not fit small wrists comfortably due to the 44.80mm case thickness, so those preferring a slimmer profile should consider a different size.