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. * Smartphone app for use with G-SHOCK Smartphone Link models. It establishes a Bluetooth connection with the watch's Connected Engine for automatic time correction, configuration of World Time and other settings, and more. It also makes it possible to keep updated with the latest time zone and summer time information. A Tough Solar power system generates enough energy to ensure uninterrupted operation of power-hungry functions.