The invoice for medical equipment must be issued in fact, the invoice you need to provide the name of the unit and tax ID number, the other side of the invoice to you should contain, invoicing time, product name, specifications, quantities, unit price total price and other basic information, if the variety of more than one ticket can not be opened, you can attach another list of invoices, invoices to show the content of the list of details as long as the sale takes place! The sale can let the seller to you to develop invoices.