Casio G Shock Mens Rubber Strap Red Analogue & Digital Watch GA 2100RRB 4ADR analog digital battery operating time: 7 months Size:U 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 Fossil leather products support responsible manufacturing via the Leather Working Group 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 afterglow) Light color LED:White Calendar Full auto calendar (to year 2099) Mute feature Button operation tone on off Accuracy Accuracy: ±15 seconds per month Other features 12 24 hour format Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents