Quantity   Component name
1 × Adafruit SCD-40 CO₂ Sensor https://www.adafruit.com/product/5187
1 × Adafruit QTPY ESP32-S2 https://www.adafruit.com/product/5325
1 × Adafruit LiIon or LiPoly Charger BFF https://www.adafruit.com/product/5397
1 × Adafruit Bicolor LED Square Pixel Matrix with I2C Backpack https://www.adafruit.com/product/902
1 × Lithium Ion Polymer Battery - 3.7V 350mAh https://www.adafruit.com/product/2750