G-SHOCK GRAVITYMASTER has long been the timepiece series at the forefront of tough timekeeping. Five side buttons and a front light button help to simplify operation by providing more direct access to functions. These models are the first of the G-SHOCK lineup to feature a large 7 x 33-dot LCD, and an ion-plated multi-faceted metal bezel, creating the image of a state-of-the-art aircraft. A bi-color molded band adds a definite touch of fashionable elegance. Connected Engine supports time correction using a time calibration signal and Bluetooth®connection. After connection with a smartphone with Bluetooth®, you can use the G-SHOCK Connected* app to configure countdown alarm settings, to manage waypoint memory contents, and to manage and store a flight log of distances and travel times of flight missions. To ensure timekeeping accuracy, time information can be obtained from an online time server and used to correct the watch's time setting.