You gain the
Augmented Body general feat and can choose an augmentation that costs 500 credits or less. You can swap out the augmentation you chose with this feat during your daily preparations, but the new augmentation must always have the same type (so a biotech augmentation can't replace a cybernetic augmentation). Any augmentation you choose with this feat is considered to be worth at least 500 credits for purposes of calculating the difference between prices when swapping your augmentations.