Casio LW-202H-8AVEF Ladies Illuminator Stone Resin Digital Watch Imported 50M Water Resistant, LED Light, Daily alarm, Hourly time signal 1/100 second stopwatch, Countdown Timer Full Auto-calendar (pre-programmed until the year 2099), 12/24 hour formats Accuracy: +/-30 seconds per month, Battery: CR2016, Approx. battery life: 7 years Module: 3225, 39.2 x 41.0 x 11.3mm / 35g