You have already participated in and cannot do it again!
The 50%-Coupon is a 1-time discount so the code only works 1-time. If you still have not used it, here are the instructions...
Step 1: Click on the Shop Now button below to place your order on our Amazon page.
Step 2: Just before finalizing your order, you will see a field to enter a "Promotional Code". Enter your 50%-Coupon there and complete your order... That's it!
Your 50%-Coupon is:
Step 3: Test the product for a few days after receiving it.
Step 4: Go to this review page and leave your feedback about this product to us. Help us improve our products with your feedback, and get your product for FREE ！
*Note: This is a 1-time discount. It will not work if you used it previously. Keep an eye out for more product test invitations coming in your email.