One use only. The character and the unit he is with will automatically pass the first Break test they have to take, regardless of modifiers and even if they would normally automatically fail their test (for example, losing a round of combat against an opponent that outnumbers them and causes fear). If the player forgets to use it, even if he rolls and passes the test, the item is still used up. Note that this item cannot he used by a character in the turn he refused a challenge and who is hiding at the back of the unit (who would pay heed to such a coward!).