If you have received a discount coupon code from Coolmuster, and don't know how to use it, then this article can help you to solve the problem.
Here is the detailed steps:
Step 1. Select and add your target item into cart, then you'll be taken into a new page.
Step 2. Find the sentence like "Have a coupon or promotional code? Enter code here" in the left corner, then you can see a interface like below:
Step 3. Type the discount code you have in the blank box, and click "Update" button. Now, you only need to wait for a few seconds, the discount off will be available on the original price.
Step 4. Enter your address and payment information, then review the order and complete the payment process.