lap distance

29 times zones (48 cities + UTC)

Countdown range: 60 minutes

carbon core guard case structure

Available in black

G-Shock • GSTB100B-1A4 • Men's Watch Color:Black lap distanceNew from the G STEEL lineup that combines different materials. The Bluetooth connect button, the GST B100 iconic disk indicator at 9 oclock, and the G SHOCK logo are accented with colors that are typical of those seen on high tech gadgets. The case has a black ion plated (IP) finish, which combines with the edgy GST B100 design to create a pair of exciting new models. Features: Case bezel material: Resin Stainless steel Resin Band Screw Lock Crown