Quantity   Component name
1 × Adafruit Pro Trinket - 3V 12MHz $9.95 Adafruit PID 2010
1 × Adafruit Pro Trinket LiIon/LiPoly Backpack Add-On $4.95 Adafruit PID 2124
1 × Monochrome 1.3" 128x64 OLED graphic display $24.50 Adafruit PID 938
1 × Lithium Ion Polymer Battery - 3.7v 500mAh $7.95 Adafruit PID 1578
3 × Tactile Switch Buttons (6mm slim) x 20 pack $4.95 Adafruit PID 1489, for menu navigation