The hardware figures show the elements of the nRF5340 Audio Development Kit (DK).
Figure 1. nRF5340 Audio DK (PCA10121) front view
Figure 2. nRF5340 Audio DK (PCA10121) back view
The following figure shows the back of the DK without the case:
Figure 3. nRF5340 Audio DK (PCA10121) back view without case