Quantity   Component name
1 × Teensy ++2.0 32u4 MCU / 128K PRGM / 8K RAM
1 × SPI uSDCard reader
1 × SSD1306 LCD
1 × 5v to 3.3v adapter
1 × ESP8266 (esp01)
1 × USB UART 5v optional 2nd serial port
3 × push buttons
1 × old 2.5" external HDD enclosure