G-Shock Watch GA-B001 Smartwatch GA-B001-1AER. GA-B001 series from G-SHOCK -Featuring a new toughness-driven design and Smartphone Link functionality. With the GA-B001 and GA-B001G, Casio brings ingenuity to the exterior structure to achieve an integrated bezel and band construction in a shock-resistant watch which comprises two separate components that connect at the 9 and 3 o'clock positions. The moulded construction follows the lines of the wrist, minimising the space between the wrist and watch for an enhanced fit. These watches are all equipped with a Mobile Link feature for pairing with a smartphone via Bluetooth?. When used with the dedicated CASIO WATCHES app, the watch automatically adjusts to the correct time. In addition, the App information function sends notifications on the watch when the app receives updates on new products and other information.