Casio #AWS90-7AV Men's Solar Analog Digital Watch Imported Tough Solar Power, 50M Water Resistant, Auto LED Light with Afterglow Dual Time, Daily Alarm, 1/100 second digital stopwatch Hourly Time Signal, Auto Calendar (pre-programmed until the year 2099), 12/24 Hour Formats Accuracy: +/-30 seconds per month, Storage Battery ML2016,Battery Power Indicator Power Saving Function, Approx. battery life: 11 months on full charge (without further exposure to light), Module 2790,Size of case / total weight: 46.5 x 39.0 x 12.0mm / 96g