You'll need to install the following libraries to use any of the LED backpacks.
Open up the Arduino library manager:
Search for the Adafruit LED Backpack library and install it
Search for the Adafruit GFX library and install it
We also have a great tutorial on Arduino library installation at:
- The backpacks all use the HT16K33 chip solely for LED driving - the mini 8x8's use the 24 pin version and the others use the 28 pin vesion