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Round grey-dial solar watch in bio-based resin, 46.00 mm case, 100m water resistance

CASIO

CASIO PRJ-B001-5 Pro Trek Grey Dial Solar Watch 100m 46.00mm

SKU CH-J7GJ-EYHHM

Solar-powered analog-digital sports watch with bio-based resin case and strap, 100 m water resistance and 46.00 mm case thickness

  • Watch movementSolar
  • Product shapeRound
  • Watch face colorGrey
  • Dial markingsIndex
  • Display typeAnalog Digital
  • Date displayDate
  • Solar charging keeps the watch running without battery changes
  • Bio-based resin case and strap reduce petroleum-based material use
  • 100 m water resistance suits swimming and surface water sports
  • Analogue-digital display shows time, date and day at a glance
  • Mineral crystal protects the dial from everyday scratches

Solar-Powered Sports Watch

The Casio Pro Trek PRJ-B001-5 is a unisex sports watch built for daily wear and outdoor activity. It runs on a Tough Solar movement that charges from any light source, removing the need for regular battery changes. The resin case and strap use bio-based materials for a lighter environmental footprint.

100 Metre Water Resistance

Rated to 100m, the watch handles swimming, snorkelling and heavy rain without issue. It is not suited for scuba diving or high-velocity water sports that exceed this depth rating. The mineral crystal protects the grey analog-digital dial from everyday knocks and scratches.

Smartphone Link Compatibility

The watch pairs with a smartphone via the dedicated Casio app to adjust settings, sync time and manage world-time data. This link frees you from operating the crown and buttons for complex changes. A compatible phone and the free app are required to use these connected features.

How it compares

Measured against everything we stock in Analog & Digital Wristwatches, at today’s prices. Recalculated every night.

Price $128.99
Typical for this category: the median of 2,679 items is $130.99.

Specifications

Product
Brand nameCASIO
Design styleSports
Watch face colorGrey
Item conditionNew
Display
Display typeAnalog Digital
Size & build
Main materialResin
Product shapeRound
Strap materialResin
Closure typeBuckle Clasp
Bezel typeFixed Bezel
Housing materialResin
Case size46 mm
Watch glassMineral Crystal
Environment & compliance
Water resistance100m
More details
Watch movementSolar
Dial markingsIndex
Date displayDate
Suitable forUnisex

Questions about this item

Will the 46.00 mm resin case fit comfortably alongside my existing watch straps?

The case measures 46.00 mm and uses a bio-based resin strap with a buckle clasp, so you can swap to any standard strap that matches the lug width.

How do I confirm the Tough Solar movement is charging correctly after first wearing it?

Expose the grey dial to light; the analog-digital display will show the power reserve indicator moving as the solar cell converts light into energy.

Does the box include a charging cable or do I need to buy one separately?

No cable is required or included; the watch charges through the dial via Tough Solar, so only the watch and documentation come in the box.

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