CASIO JAPAN watch. Display lighting: A built-in light illuminates the watch face from one side. Stopwatch - 1/100 sec. - 1 hour : Elapsed time, partial times and end time are measured with an accuracy of hundredths of a second. The watch has the ability to time up to one hour. Daily Alarm: The daily alarm emits an audible signal at the scheduled time to remember events that are repeated daily. Automatic calendar: Once set, the automatic calendar always shows the correct date. 12/24 hour normal time display Hours are displayed in either the 12 or 24 hour format. Resin case: The strap contains synthetic resin, an ideal material for this component given its extreme strength and flexibility. Battery: The battery provides the watch with the necessary power for approx. Battery type: CR2016 Water resistant according to ISO 22810 This model withstands small splashes of water. Any further contact with water should be avoided. Accuracy: +/- 30 sec seconds Dimensions: 38.2 mm x 33.2 mm Thickness: 8.5 mm Weight: approx. 21g