CASIO E EFR-539D-1AVU

Case Size (L × W × H): 54.1 × 49.5 × 11.7 mm
Weight: 185 g
Case and Bezel Material: Stainless steel
Band: Stainless steel band
Clasp: One-touch 3-fold clasp
Water Resistance: 100-meter water resistance
Power Supply and Battery Life: Approx. 2 years on SR920SW

Exterior:

Glass: Mineral glass
Back Plate: Screw lock back
Surface Treatment: Ion-plated gray bezel
Watch Features:

Stopwatch: 1/10-second stopwatch

Measuring capacity: 59'59.9"
Measuring modes: Elapsed time, split time, 1st–2nd place times
Accuracy: ±20 seconds per month
Other Features:

Regular Timekeeping:

Analog: 3 hands (hour, minute, second), 3 dials (1/10-second stopwatch, stopwatch minutes, stopwatch seconds)
Date Display