Detailed Product Description stop watchFeatures: Chronograph - 1/100 second in the 1st 30 minutes, after that, in 1 second, up to 23 hours 59 minutes and 59.99 secondsClock- Hour, Minute, Second, Month, Date, Day and Auto Calendar- 12/24 hour system user option- Hourly chime and alarm- 7# (AAA) Battery - Size: 80.7 x 55.5 x 22.2 mm- N.W: 48.0 g