You can learn a lot of information from just a quick scan of an area or object.
Prerequisites: Listen 5 ranks, Spot 5 ranks.
Benefit: You can make one Spot check and one Listen check each round as a free action.
You also gain a +2 bonus on initiative checks.
Normal: Using Spot or Listen in a reactive fashion is a free action, but actively trying to make a Spot check or Listen check requires a move action.
Source: Complete Adventurer, page 112.