It also employs high-density mounting with a flatter, optimized layout. Using only two watch hands and running on a low-power Bluetooth system, the GST-B400 models consume 55.7% less power than their predecessor.
The lower power requirement means the dial does not have to be as light-transmissive, offering an improved design. Treatments applied to designed inset dial parts and elsewhere give the watch face a metallic texture. With a dial indicator at the 9 o’clock position to display the mode, battery level and more, Casio took great pains to ensure great readability as well.
Both the GST-B400AD and GST-B400BD models feature multilayer vapour deposition-treated dials for highly chromogenic and distinctive colouration. Multiple layers of clear coatings are applied to shape the appearance of the light, resulting in chromatic expressions of blue shades and a newly developed deep red hue.