A 'mini' keyboard with 15 keys, each one with its own PMOLED display. The keyboard connects via USB, and also includes a USB port.

The keys are the same as the full Optimus Maximus keyboard (48×48 pixels with 65K colors). The price of the Aux was supposed to be $650, but apparently it was never released.

OLED type: 

15 48×48, 65K color PMOLEDs

Merck - Advancing Display, Advancing LifeMerck - Advancing Display, Advancing Life