Casio G-Shock GM5640GEM-1D 40th Anniversary Adventurer’s Stone Limited Edition

Chart your own course with a G-SHOCK 40th Anniversary Adventurer’s Stone limited-edition timepiece. 
Join us in celebrating the G-SHOCK 40th by choosing one of these spectacular metal-clad watches, which are inspired by the stones adventurers have used to navigate since ancient times.
The special colors of the minerals ancient seafarers used to find their way are reproduced in these watch designs with forging, ion plating, and masking processes, giving each metal bezel a one-of-a-kind look. The bands are made with colored or translucent resin and are uniquely textured with hot-stamping and Garal color molding techniques. 
These limited-edition timepieces celebrate the G-SHOCK 40th through and through: the phrase “SINCE 1983” appears on the dial; the Eric Haze-designed 40th logo is engraved on the case back, and there are four stars for 40 on the band loop.
 
Basic Information
Case size (L× W× H): 49.6 × 43.2 × 12.9 mm
Weight: 78 g
Case / bezel material: Resin / Stainless steel
Resin Band
Shock Resistant
200-meter water resistance
Approx. battery life: 2 years on CR2016
 
Exterior
Mineral Glass
Black ion plated bezel
Rainbow ion plated bezel
Compatible band size: 145 to 215 mm
 
Watch Features
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
Hourly time signal
Multi-function alarm
Flash alert
Flashes with buzzer that sounds for alarms, hourly time signals
Electro-luminescent backlight
Afterglow
EL:Blue Green
Full auto-calendar (to year 2099)
Accuracy: ±15 seconds per month
12/24-hour format
Regular timekeeping: Hour, minute, second, pm, month, date, day