G-Shock Anti-Magnetic Resistance G100-1BV Watch. Ever heard of the K.I.S.S theory? Sometimes simple is better. This G-Shock has all the hallmarks of a classic. With Shock resistance, 200M WR, Anti-Magnetic resistance and more it's a perfectly balanced timepiece. Black resin band analog and digital watch with black face. Features include: Shock Resistant 200M Water Resistant Magnetic Resistant* EL Backlight with Afterglow  Dual Time Daily Alarm 1/100 Second Stopwatch Measuring capacity: 23:59'59.99"Measuring unit: 1/100 second (for the first 60 minutes)1 second (after 60 minutes)Measuring mode: Elapsed time Auto Calendar (pre-programmed until the year 2039) 12/24 Hour Formats Accuracy +/- 15 seconds per month Battery CR2016 Approx. battery life: 3 years Module 2327/5158 This watch comes with a G-shock authenticity certificate.