Casio G-SHOCK X Kevin Lyons tie-up model GB-5600B-K8JF Mens Wristwatch Japan Import Imported Waterproofing function: 20 standard atmosphere waterproofing Backlight: LED backlight (Autolite function, super illuminator, afterglow function,) with afterglow time change over (1.5 seconds /3 second) World time: Clock of 100 city (with 35 time zones, summer time set-up function) +UTC (coordinated universal time) of the world Battery life	: Approximately two years (when use mobile link function for 12 hours per day)