Log in to ERGATTA, select the product you want to buy and add it to the shopping cart, and select the corresponding ERGATTA Promo Code to complete the payment. It should be noted that ERGATTA Promo Code has corresponding conditions of use. The way to check the conditions of use is to click ERGATTA Customer Center and find My Coupon Code page, then you can browse the ERGATTA Coupon and there are usage rules at the bottom of each coupon.