Quantity   Component name
1 × ATTINY212-SSN 2KB 8-bit Microcontroller
1 × PKMCS0909E4000-R1 9mm x 9mm x 1.9mm Piezo Buzzer
1 × 156120VS75300 Green Reverse Mount LED
1 × 156120RS75000 Red Reverse Mount LED
1 × 156120YS75300 Yellow Reverse Mount LED
1 × 156120BS75000 Blue Reverse Mount LED
4 × 5173 Dome Switch Tactile Dome Switch by Keystone Electronics