Students and entrepreneurs from the United States and South Korea has developed a smartwatch for the blind. This smartwatch is called Dot and can show four braille characters at a time. Each character space has six active pins that rise and fall to produce the combinations of the braille alphabet and numerical system.
The watch connects vie Bluetooth to a smartphone and uses a actuator powered by magnets to raise and lower the pins. Dot can shows texts, notifications, tweets and the time. If the user recive notifications this machine will vibrate. Before this new invention the blind people only can use smarthphones with vocal systems like Siri to read texts out loud.
You can start to buy Dot in the United States and Canada sometime in 2016 for $300, more cheaply than the existing braille machines.
This will be so helpful for the social life of blind people, but I don't think that is extremely necessary for a person.
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