Falcon's Call

Falcon's Call is used on leg and head armor to permanently increase ranged attack power, stamina, and chance to hit.

Source
Falcon's Call is a quest reward from the quest which starts with Zanza the Restless in Zul'Gurub in Stranglethorn Vale. To complete the quest, you must turn the following items to Zanza the Restless:
 * 1
 * 1