A standard telephone keypad, with four rows of three keys each. The top row consists of 1, 2, and 3, with keys continuing down in order until the last row, which is usually *, 0, and ...

Otherwise, it's still a smooth surface like many of the other designer phone keypads, however it feels like plastic instead of metal, which kind of makes it feel like a microwave oven keypad.

A few things stand out about [Vijay]’s braille keypad for smartphones ... sitting on the back of the smartphone such that you hold the phone much as you often normally would.