Casio Baby G Ladies Watch BGD105-7DR Shock Resistant, 100M Water Resistant, EL Backlight with Afterglow Flash Alert, Dual Time, Daily Alarm, Countdown Timer, Auto Calendar (pre-programmed until the year 2099) 12/24 Hour Formats, Button Operation Tone On/Off, Active Display On/Off 4 Selectable Time Formats, Accuracy: +/- 30 seconds per month Battery: CR1616, Approx. Battery Life: 2 years, Module 3164, size of case/total weight: 41.1 x 39.0 x 11.1mm / 42g