The Dot uses a moveable braille interface made of magnets and pins strapped to the wrist like a watch Until now, visually impaired smartphone users have had to rely on Siri and other readers to find their way around the Internet and digital world, but a new device in development in South Korea may change their experience completely by instantly turning text messages and other information into braille. The Dot, a device that straps around the wrist like a watch, uses magnets and a grid of pins to create four braille characters at a time that change at adjustable speeds, allowing users to read text messages and use apps on any device via Bluetooth.