GST-B400-1AAn ultra thin module encased in carbon fiber makes for a stylish G STEEL timepiece with the slimmest profile yet. Strong, yet lightweight, the carbon core guard structure absorbs external shocks and retains Bluetooth connectivity and solar power functionality even with smaller components and a thinner module. Measuring just 12. 9mm from the back of the case to the top of the bezel, the GST B400 is over a millimeter thinner than its predecessor. Your

battery life: 10 years on CR2025

Sku: ES5249SET

Strap back

In addition to Life Log and Activity History apps

Sku: ES5097

Case Color: Black & Gold - Yellow

An original spin in on-trend green for details like the logo

Sku: ES5131

316L stainless steel case with topazes

Case Size: 38MM

dark black give these watches

flattened for slimness