The SBGA211 is powered by Spring Drive, Grand Seiko's unique caliber that combines the power of a mainspring with the high precision of a quartz watch.The case and bracelet are made of high-intensity titanium, providing a scratch-resistant and corrosion-resistant finish, making it 30% lighter than stainless steel and a pleasure to wear. The blue steel second hand moves smoothly in a gliding motion, shining against the contrast of the pure white face to create an even more dramatic effect.It has a 72-hour (3-day) power reserve and a power reserve indicator at the bottom left of the dial.