Take the hard-core energy as the inspirational muse of this X series watch, and interpret the watch external multi-level muscle power beauty and internal wisdom energy through modern mechanical art aesthetics. The X Series watch features a self developed automatic mechanical movement which power reserve up to 40 hours. The kinetic energy is harnessed from your activities and used to power the mechanical movement, so the watch should be worn at least 8 to 10 hours a day to ensure the watch can wind automatically or wind manually to operate the watch normally.CIGA Design X series watch adds an independent spring suspension system in the four corner to make the super control feel condensed between the wrist. When the watch case collides, the inner case and the movement play the role of offsetting the external force, damping and buffering, which can better protect the movement of the movement. Carved from 316L stainless steel with DLC coating and after repeated polishing, the case is more durable and scratch-resistant. The hands featuring Super-LumiNova reusable super luminous material, decoration and functionality go hand in hand, creating a cool dark night vision effect. This CIGA Design X series watch will come with two straps: one food-grade silicone strap & one Nano coating nylon strap to meet your needs for different occasions.