Quantity   Component name
1 × Adafruit Feather M0 (Atmel SAMD21G) basic proto CPU, battery management, debug port
1 × Adafruit Music maker featherwing (VLSI VS1053) Multiformat audio decoder and SD card holder
1 × Stereo Enclosed Speaker Set - 3W 4 Ohm
1 × Adafruit TPA2016 amplifier breakout Analog 2.8W stereo amplifier with AGC
1 × Seeed studio NFC grove (NXP PN532) RFID reader w/ antenna
2 × Adafruit Arcade button w/ white LED
1 × Light barrier (Vishay TCST2103) RFID presence detector
1 × DTP 2000mAh 3.7V LiPo battery
8 × Mifare classic (ISO14443A) RFID transponder Plastic badges
1 × Transcend 8GB SDHC
1 × Plywood