G-Shock • GBM2100A-1A3 Color:Green Simply tap on the app

Simply tap on the app to effortlessly manage functions like selecting a city from the World Time list

This long lasting power will translate in years of reliable training data

which is more than one millimeter less than the GSTB100 model

Effortless meets elegant in this pristine gold-tone timepiece featuring an unmarked face with analog movement and surrounding crystal embellishments on the case

LightLED backlightAuto light switch

G-Shock • GBM2100A-1A3 Color:Green Simply tap on the appMetal clad daring meets sophisticated gleam in a GBM2100 that delivers Smartphone Link via Bluetooth and Tough Solar charging system, all in a meticulously finished metal design with iconic octagonal bezel. Choose from a basic black dial or metallic vapor deposition in blue or green, each complemented by a band made of environmentally responsible bio based resin. Welcome to a whole new level of metal clad 2100 functionality tough construction and