Your affinity for magic items allows you to determine the correct way to activate them, instead of just activating them blindly.

Prerequisite: Use Magic Device 5 ranks.

Benefit: You can use Use Magic Device to guess the command word, or other special means of activation, of a magic item. This takes 10 minutes of uninterrupted concentration, and the DC is equal to 20 + the item's caster level, or 25, whichever is higher. Once you have determined the command word for the item, you can activate it normally, without needing to use Use Magic Device to activate blindly. If the item has special requirements you do not possess, you may still need to use Use Magic Device to emulate those.