It's a thankless task, but sending out monthly invoices is what keeps your business going. So it's critical to get the right invoices to the right customers the first time, every time. And while doing it by hand assures you of accuracy, that time could be put to much better use. The Relay 2000 inserter automates your monthly mail. You get the speed of machine-processed mail that's even more accurate than putting it together piece by piece.