Product details:

Experience exceptional durability with the Casio G-Shock Men's Watch GA-100CB-1AJF. Made in Japan, this black timepiece combines style and substance, perfect for the modern man. Enjoy accurate timekeeping and rugged fashion in one reliable package.Waterproofing function: 20 standard atmosphere waterproofing
Backlight: LED light (with Autolite, afterglow function, afterglow time change over (1.5 seconds /3 second))
Electric wave automatic repair function: Nothing
Battery life: Approximately two years
Band material: Resin