CASIO G-SHOCK "Military Black Series" GA-100MB-1AJF JAPAN IMPORT Imported System unit size (H X W X D) mm:55.0*51.2*16.9 Band (mm):145-215mm System unit weight:72 g Waterproofing function:20 standard atmosphere waterproofing Backlight:LED light (with Autolite function, afterglow function, afterglow time change over (1.5 seconds /3 second))