sparkfun KIT-14173 Hook-Up Manual page 3

The Spectacle Audio Board uses a microSD card to store the audio files to
be played. The files should be stored as .ogg Vorbis encoded files. This
free audio file format can be played and created on any type of computer.
Later in the tutorial we'll show you how to convert from MP3, WAV, or other
file formats to the .ogg format.
The files must be named by number, which is how they will be referred to
from within the configuration application. Filename examples are 00.ogg,
01.ogg, 02.ogg, and so forth.
Spectacle Button Board
The Spectacle Button Board allows you to add input from buttons or
switches to your Spectacle projects. It has a total of 9 signal inputs, eight of
which can come from external buttons and one button directly on the board.
Spectacle Button Board
 DEV-1404 4
tl;dr
1. Buttons or switches can be connected to the board by pushing wires
into the "poke home" type connectors on the board.
2. Up to nine signals are available.
3. Button signals can be either momentary or continuous.
Meet the Spectacle Button Board
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