How do I use the HP Envy Photo 7800 without a wireless router?
You can print wirelessly without a router using Wi-Fi Direct. Make sure Wi-Fi Direct is enabled, then check its status, network name, and password by opening the Dashboard and touching the Wi-Fi icon. Learn more at www.hp.com/go/wifidirectprinting.
From the official HP Envy Photo 7800 All-in-One Printer manual, page 2
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