G-Shock GSTB400AD-1A4 G-Steel Data Gemstone Quartz Powered by Seiko’s Calibre V172

Powered by Seiko’s Calibre V172 solar movement

Featuring a one way rotating elapsed time bezel

4R38 - Automatic Movement – Powered by the movement of the wearer - 41 Hours Power Reserve - 40

while the stainless-steel case and bracelet exude durability and sophistication

G-Shock GSTB400AD-1A4 G-Steel Data Gemstone Quartz Powered by Seiko’s Calibre V172Introducing the new improved slim design G STEEL GST B400 with Bluetooth and Solar functions. G Shock Connected App Mobile Link (Wireless using Bluetooth) Tough Solar Stainless steel Bezel & Bracelet Mineral Glass Neobrite Shock Resistant Carbon Core Guard structure 200 meter water resistance