Specifications about GW-A1100-1A3ER watch : Quartz movement Sapphire glass Black resin band Solar power Radio signal reception (Europe, Japan, China, United States) Shock resistant (impacts, vibrations…) Analog display with luminous index and hands 12/ 24h timekeeping Word time function Automatic hand adjustement Alarm, automatic calendar, chronometer, countdown, compass Water resistance : 660 feet (20 ATM) This watch is guaranteed two years.