Take Ring / bracelet

Because of defects in the visual, visually-impaired have a lot of restrictions in their daily life. Although they received some basic training (such as orientation and mobility), while such training can only help them reach the bus station. Imagine if there is a product that can help the visually-impaired judgment bus number, when arrived the destination the product will remind them while they get off the bus. So if the visually-impaired going out alone and no one around at the time, they won't fell so insecure. And go out to them, they will not only disturbed, will accumulate a lot better.