The most classic derivative of 5600 in Casio G-Shock, GWM5610-1 supports six radio waves, optical kinetic energy drive, automatic backlight, daily boss and 200m waterproof. The 5600 series has little change in appearance, but it is a classic choice for all kinds of players. The versatile appearance is a good choice whether it is retro small fresh or trendy front. Casio GWM5610