Can I use the HP OfficeJet Pro 7720 wirelessly without a router?
Yes, with Wi-Fi Direct you can connect your computer or mobile device (such as a smartphone or tablet) directly to the printer wirelessly without connecting to an existing wireless network. Note that you might need HP software installed on your computer or mobile device to use Wi-Fi Direct. For more information, visit 123.hp.com/ojp7720.
From the official HP Officejet Pro 7720 Wide Format All-in-One Printer manual, page 1
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