G-SHOCK - GSTB100-1AA G STEEL model featuring a solid case, a chronograph with an analog display, and a urethane band designed with a motif of heavy jet engine blades. A dual coil motor in a rotating disc dial placed at 9 o'clock moves the dial blades and exudes a functional beauty. In addition to the alarm on off function and using the rotation to show the stopwatch, etc., it also functions as a battery indicator, contributing to a tough chronograph. The layer guard