You can add any 2 items in this 'Buy 1 Get 1 FREE' collection to your cart, and use the code: DEAL2 at the checkout page to get 1 of them FREE.
Please note: The code could be used for more than 1 time per order, e.g. Buy 4 items, 2 will be free; buy 6 items, 3 will be free, etc.