Ring of The Monkey (3.5e Equipment)
From D&D Wiki
 Ring of The Monkey
This ring is crafted in the shape of a monkey grabbing its tail. Its wearer gains a +10 competence bonus on Climb and Balance checks when scaling trees. The wearer can also converse freely with any species of monkey and ape. The animals are always amiable towards the ring’s wearer. It does not grant control over the them.