The smart wearable device commonly uses high hardness of sapphire material currently, which can effectively resist scratches. But sapphire material has a fatal weakness, that is, when the sun is strong, can’t see the dial display. It coats the sapphire surface that the sapphire-like super-hard and anti-reflective thin-film technology. Through the coating process, the reflectivity reduces from 8% to under 1%, the hardness of sapphire is still 9H + the same as the sapphire. And after technical improvement, the smart wearable device have the anti-reflection, super-hard, anti-fouling and other functions, even under bright light can be clearly seen. It really do the“Hard surface, brilliant display”. 


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