Quantity   Component name
1 × Raspberry Pi ZERO/a+/b/b+/2
2 × Brass M2.5 Standoffs for Pi HATs - Black Plated - Pack of 2 https://www.adafruit.com/products/2336
1 × Panel Mount 2.1mm DC barrel jack https://www.adafruit.com/products/610
1 × Miniature WiFi (802.11b/g/n) Module: For Raspberry Pi and more (Optional) https://www.adafruit.com/products/814
1 × 5V 2A (2000mA) switching power supply - UL Listed https://www.adafruit.com/products/276
1 × Mini Thermal Receipt Printer https://www.adafruit.com/products/597
1 × Rugged Metal Pushbutton with Blue LED Ring - 16mm Blue Momentary https://www.adafruit.com/products/481
1 × Ethernet Hub and USB Hub w/ Micro USB OTG Connector. (Optional) https://www.adafruit.com/products/2992
1 × Socket RJ11 (6P4C).
10 × #4-40 screws (1/2 inch), and 10 hexnuts Electronic Components / Misc. Electronic Components
1 × 3mm acrylic sheet black, 39cmx23cm
1 × 3mm acrylic sheet white , area 28cmx22cm