Quartz Movement - Digital Function - Day & Date - 1/100-second Stopwatch - Micro-light- Daily Alarm, Auto Calendar - 12/24 Hour-Format - Approximate battery life of 7 years on CR2016. 36.8mm x 33.2mm 8.2mm Stainless Steel Square Case - Solid Caseback - Easy to Press Button Arrangement. Black Dial - Black Digital Font and Arabic Numbers. 20-15mm Stainless Steel Self Adjustable Strap with Push Button Deployment Clasp. Water Resistant. Please press and hold the button from the right side for a few seconds and the CASIO sign should come up