Shockproof, resin construction stands up to heavy abuse. Analog hands display current time, while a small digital display can show a different time zone in 12- or 24-hour formats. Afterglow backlighting illuminates face for nighttime use. Stopwatch feature has .01-second accuracy, tracks up to 24 hours and features an elapsed-time mode. Daily alarm clock and calendar ensures you’ll never sleep in. Watch has ±15-second accuracy per month. Water-resistant to 200 meters. Shockproof. CR2016 battery lasts up to three years. Case diameter: 47.8mm.