Japanese quartz analog and led digital dual movement, accurate and long-term running Stainless steel back cover, two-tone 45mm zinc alloy case, hardened mineral glass crystal luminous hands led backlight dial with chronograph dual time alarm SIG snooze function, and show the specific hour, minute, second, day, month and week. Water resistant over 30M(100 feet), suitable for snorkeling, as well as swimming, but not diving. Note: Please do not press any buttons in the water or wear this watch for longtime underwater activities