These new lightweight metal models, with newly advanced shock-resistant structures, are the latest additions to the MT-G lineup that packs the latest that technology has to offer into shock-resistant designs that combine metal and resin materials. A Carbon Core Guard structure combines with the Metal Core Card structure to create a new Dual Core Guard structure, which houses a module protected by an integrated carbon monocoque case and exterior metal parts. The metal frames have a new type of slide lever mechanism that makes band replacement quicker and simpler, and metal is also used for the outer case sides. Functionwise, these models maintain constant Bluetooth® connection with a smartphone running the G-SHOCK Connected app to obtain accurate time information from an on-line time server for automatic time adjustment, even if you move between time zones. MULTIBAND 6 automatically adjusts time settings based on reception of one of six calibration signals around the globe when you are within the range of a signal, even if connection with a smartphone is not possible, for accurate timekeeping no matter where your travels take you.