Quantity   Component name
1 × Adafruit NeoTrellis https://www.adafruit.com/product/3954 Neotrellis RGB Driver PCB for 4x4 Keypad
1 × 4x4 Neotrellis Feather M4 Kit https://www.adafruit.com/product/4352 adds Feather M4, acrylic housing, silicon elstomer button keypad ec
1 × Adafruit Feather M4 Express https://www.adafruit.com/product/3857