Front Panel

The front panel features a few buttons, indicators, and a rotary encoder; it also is a breakout to connect to the display, but this is mounted separately from the board.

Buttons

Indicators

Display

Any SPI display is compatible with the front panel, though it is specifically designed for the ER-OLEDM032-1Y module (or any other compatible modules with other colors; do note that the display may need to be modified for 4 wire SPI operation, by soldering some resistors and jumpers) and its pinout.