Casio G Shock Mens Rubber Strap Red Analogue & Digital Watch GA 2100RRB 4ADR analog digital modern style Model SKU BJ8055 04E modern style battery operating time: 7 months on rechargeable battery (operation period with normal use without exposure to light after charge) 18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Accuracy Accuracy: ±15 seconds per month (with no mobile link function) Other features 12 24 hour format Day display (days of the week selectable in six languages) Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents daylight saving on off Stopwatch 1 100 second stopwatch Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes) 1:00'00~23:59'59 (after 60 minutes) Measuring unit: 1 100 second (for the first 60 minutes) 1 second (after 60 minutes) Measuring modes: Elapsed time 1st 2nd place times Timer Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 second to 24 hours (1 second increments