Here are the steps on how to use Promo Code when shopping at onken.co.uk: Make sure you have an account in Onken; if not, you can create one first, then select your favorite products to add to your cart. Then, click the Calculate button, and finally jump to the payment page, you will see the information of [Select your Coupon], click to select the Coupon Code you want to use, and then return to the payment page to continue to complete the payment. Please note that used Coupon Code will be automatically removed from your coupon.