Solar charging and radio control (Regional Natural Park of Pilat) silkworm. This is still the size G.Shock if we talk but I find it well done, not too heavy and adapting well to my smallish wrist. All dials indications despite the black background are perfectly readable but not as clear-cut as if the background was clear (digit black on white). The night lighting is perfect, standby overnight. All the usual functions of Casio watches are there: stopwatch, timer, world time (48 cities). The enclosed leaflet in French is well designed and particularly emphasizes advising on the solar charging. Remains to be seen in time but right now I do not regret my purchase.
