We have a Laserjet Pro 400 M451nw printer in our office. The printer doesn't do automatic duplex printing (double-sided) and we need to do double-sided printing. I'm new in the office and the printer was chosen by my predecessor who had no knowledge or experience with printers and ordered the wrong model. Our IT support has told us that we need to puchase an automatic duplexing unit. I know what this is but I'm at a lost at how I go about ordering such a part? Does this model printer definitely not do duplex printing? Where do I go to order such a part and is there a specific model/unit I need? Anyone have any suggestions as to what I can do? Thanks.
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