We check all orders received by us in connection with the packaging as closely as possible for compatibility, i.e. if you have ordered with a voltage of 24V, for example. LED-tape and a 12V transformer, we will contact you to check if this was the case. You can also send us the contents of your shopping basket for checking before you place your order:Go to the shopping cart page and click on the "Share and save shopping cart" button below the products.Save the link from your shopping cart to return to your shopping cart where the products you have selected are located.Send the link to us by email, you can include the information you are wondering about and what you are about to enlighten.We will get back to you as soon as possible!