Tough Solar ensures stable operation while using power-hungry functions
1/5 Second Stopwatch
Date Display

At a glance

The new EFR545 series of timepieces are powered Casio’s Tough Solar technology. These eco-friendly solar battery-powered timepieces can be charged even in low or fluorescent light, eliminating the need for continuous battery changes.

In addition, the EFR545 series of watches come equipped with a 1/5th second chronograph, tachymeter, 12/24 hour sub-dial, and are water resistant up to 100 meters and also feature a low battery alert.



    • Tough Solar Power
    • 100M Water Resistant
    • 1/5 second stopwatch
    • Measuring capacity: 59'59.8"
    • Measuring modes: Elapsed time, split time and two finish times
    • Tachymeter
    • 12/24 hour formats
    • Mineral Glass
    • Screw Lock Back
    • Resin Band (EFR545SB & EFR545SBPB)
    • Solid Stainless Steel Band (EFR545BD & EFR545SBDB)
    • One-touch 3-fold buckle (EFR545BD & EFR545SBDB)
    • Stainless Steel Case
    • Stainless Steel Bezel
    • Low battery warning
    • Accuracy: ±20 seconds per month (with no signal calibration)
    • Storage battery: Solar rechargeable battery
    • Power saving function
    • Approx. battery life: 6 months on full charge (without further exposure to light)
    • Module: 5274


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