Water resistant to 20 ATM: Can be used in a variety of situations, including daily water work, swimming, surfing, jet skiing, and other water activities EL backlight (with afterglow function) Other product specifications: Stopwatch, Timer, Multi Alarm, Hourly Time Signal, Full Auto Calendar, 12/24 Hour Displays, Flash Alert Function International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. -Band: resin band Length: 145-200mm/22.8mm -Case size: 43.8 x 38.4 x 10.9 mm Mass: 50g Shock-resistant structure 20 ATM water resistant function Stopwatch (1/100 second (00'00"00 - 59'59"99) / 1 second (1:00'00" - 23:59'59"), 24 hour meter, with split) Timer (set unit: 1 second, maximum set: 24 hours, measured in 1 second units, auto repeat) Multi-alarm/time signal Full auto calendar 12/24 hour display switching EL backlight (with afterglow function) Report sound flash function (alarm / time signal / timer interlocking light emission)