To begin, locate your coupon code on this page and click the button to copy it to your clipboard. Next, proceed to planetarydesign.com and input your code in the designated "Promo Code" box during checkout. Your discount will be applied to your shopping cart, resulting in a reduction of your total order amount. It's important to carefully read the coupon's instructions on this page to ensure proper application. Note that certain coupon codes may have exclusions, which will be indicated on this page.