Ears of the Bat

You gain the keen hearing and echolocation abilities of a bat. for the duration of the spell, you have advantage on Wisdom (Perception) checks that rely on hearing, and you gain blindsight out to a range of 60 feet.

You cannot use the blindsight ability while being deafened.

While the spell is in effect, you have disadvantage on saving throws against spells and effects that deal thunder damage.