CASIO Pro Trek PRW6900YL-5 watch

Solar-powered outdoor watch

The Casio Pro Trek PRW6900YL-5 combines analog and digital displays in a 49.6 × 44.8 × 14.7 mm resin case with a brown leather strap. Solar charging keeps the rechargeable battery topped up without cable charging. Multiband 6 atomic timekeeping corrects the time automatically via radio signals. Built-in altimeter, barometer, compass and thermometer give hikers and field workers environmental data at a glance.

Thermals and power in daily wear

Tough Solar power draws energy from any light source so normal indoor and outdoor exposure maintains charge without user intervention. A power-saving function blanks the display when the watch is left in darkness to extend running time. Low-temperature resistance to -10 °C / 14 °F ensures the movement and LCD remain responsive in cold conditions. No active cooling or audible components are present so operation is silent.

Build quality and everyday connections

The resin case with black steel bezel and screw-down crown delivers 100 m water resistance for swimming and surface water sports. Smart Access electronic crown with quick-lock allows rapid setting changes while guarding against accidental adjustment. Fixed bezel and buckle clasp keep the strap secure during vigorous activity. Neo-Brite luminous hands and markers plus full auto double LED backlight with afterglow provide legibility in darkness without external tools.