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From Pathfinder Howl of the Wild, which isn't enabled.

Pallesthetic Mutagen

ITEM 9
Price 150 gp
Usage held in 1 hand
Bulk L

Activate (manipulate)

You gain unparalleled sensitivity to the tiniest of vibrations through solid surfaces and even the very air around you, but your eyes become useless.

Benefit For 1 minute, you gain precise echolocation out to 40 feet, imprecise tremorsense out to 60 feet, and a +2 item bonus to Perception checks using either of these senses.

Drawback You are Blinded for 1 minute.

Effect: Pallesthetic Mutagen

Pathfinder Howl of the WildORC