And if you are asking how to put into the code, here's the clue
Your discount code can be added to your cart which you will find if you click "Go to Cart" in the upper right corner. The discount will immediately be discounted from the total sum when applying the coupun. And oh you can only use one discount code per order!
*MORE NOTE: THEY JUST ADDED A NEW LIMITED WATCHES IT'S BLUE AND RED! *DIESSSSS