Step 1: Visit http://ace.subagames.com/KManager.aspx
Step 2: Type in/paste your redemption key into the "Add Key" box and hit Enter on your keyboard.
Step 3: Scroll down the page(if needed) and click the check mark to redeem the item. Once clicked, the item is sent to your in-game mail box and the duration on the item will begin to count down. (Please note: To ensure delivery of the item, please ensure your character has been created before completing this step!)
Step 4: Sign into ACE Online, and the gift will already be in your inventory!