The G-Steel lineup offers analog chronograph watches with the rugged shock- and water-resistance you've come to expect from G-Shock. Equipped with Bluetooth®, they connect with your smartphone at the press of a button, and acquire time information from an Internet time server, so you know exactly what time it is no matter where you are. Even better: they feature Tough Solar in combination with CASIO original power-saving technology for a stable supply of power.