In the homepage you will find blue gifts box on the right bottom corner.
Sign-In and check the reward that you want to redeem. Click on the reward that you choose, copy the code and paste it in the discount section that will be in the checkout page.
-30 electrons =Free shipping coupon
-200 electrons = 3KD off coupon
-500 electrons = 7KD off coupon
-800 electrons = 15KD off coupon
50 electrons = 1KD