The casio g-shock origin is a solar-power-only watch capable of tracking and digitally displaying steps. 52mm green bio-based resin case; vapor deposition-finish bezel ring black sunray analog/digital dial with silver-tone phosphorescent-finish hands and markers mineral crystal functions include world time, stopwatch, timer, alarm and on/off high-brightness led light pair to smartphone via bluetooth® and use the casio watches app tough solar japanese quartz and digital movement green bio-based resin band; buckle clasp water-resistant to 200 meters