Join the 40th anniversary celebrations marking G-SHOCK milestones with a selection of signature revivals in solid, time-tested all-black. In homage to the brandƒ?ª?s evolution, these special designs memorialize iconic models from the past with their names hot-stamped on the band to textural, indented effect. On the DWE-5657, DW-6640, and GA-2140, a side button is engraved with a star in a nod to the 40th anniversary, as is the GA-114 with a star printed on the watch glass. The band and bezel of every model in the line are made with bio-based resins. The 40th anniversary logo designed by Eric Haze is engraved on the case back, and also appears in silhouette when the light button is pressed on the DWE-5657 and DW-6640. With four stars for 40 engraved on the band loop and other special details, these limited-edition timepieces are heirs to G-SHOCK history. Case / bezel material: Bio-based resin Bio-based resin band Shock Resistant Mineral Glass 200-meter water resistance LED backlight (Super Illuminator) Afterglow LED:White 1/100-second stopwatch Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes) 1:00'00~23:59'59 (after 60 minutes) Measuring unit: 1/100 second (for the first 60 minutes) 1 second (after 60 minutes) Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments) Other: Auto-repeat Multi-function alarm Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Flash alert Flashes with buzzer that sounds for alarms, hourly time signals, countdown timer time up alarm Regular timekeeping: Hour, minute, second, pm, month, date, day Accuracy: Çï¶Ï15 seconds per month Approx. battery life: 5 years on CR2016 Size of case : 53.2 _ 50 _ 18.7 mm Total weight : 71 g