Bio-based resin with mineral glass.Made in Thailand.FIDLOCK® buckle closure with adjustable band.G-SHOCK shock-resistant construction and 200-meter water resistance.1/100-second stopwatch Approx. battery life: 5 years on CR2016.LED backlight (Super Illuminator) LED:White.Flash alerts with buzzer that sounds for alarms, hourly time signals, countdown timer time up alarm.Accuracy: 15 seconds per month