This is for custom orders or dealer orders only which have been previously discussed and agreed upon. Inside the “Order Notes” box on the shipping form, please enter your invoice number from the PDF invoice sent to you via Sales [at] daringaudio [dot] com. For the order amount, the “Custom Order” unit price is $1, so simply Type in the the quantity [like “566”] to match the US $ Dollar total amount of the invoice. If there are any questions we will let you know, and of course you can email us at Sales@daringaudio.com at any time. Thanks in advance for your order.