The warded Creature or object becomes difficult to detect by Divination Spells such as clairaudience/clairvoyance, Locate Object, and detect Spells. Nondetection also prevents location by such magic items as crystal balls. If a Divination is attempted against the warded Creature or item, the caster of the Divination must succeed on a Caster Level check (1d20 + caster level) against a DC of 11 + the Caster Level of the spellcaster who cast nondetection. If you cast nondetection on yourself or on an item currently in your possession, the DC is 15 + your Caster Level.

If cast on a Creature, nondetection wards the creature's gear as well as the Creature itself.