Mithral Full Plate Of Speed

As a free action, the wearer of this fine set of +1 mithral full plate can activate it, enabling him to act as though affected by a haste spell for up to 10 rounds each day. The duration of the haste effect need not be consecutive rounds. The armor has an arcane spell failure chance of 25%, a maximum Dexterity bonus of +3, and an armor check penalty of –3. It is considered medium armor, except that you must be proficient in heavy armor to avoid taking nonproficiency penalties.