Quantity   Component name
1 × ItsyBitsy M4 Express
1 × Adafruit eInk Breakout Friend
1 × Waveshare 400x300 4.2in three-color E-Ink display
1 × PKCell 2200mah Lithium Ion Battery
1 × MCP73831T Power Management ICs / Power Supply Support
1 × PCF8523 Clock and Timer ICs / Real-Time Clocks