How do I connect the ET-3850U using Wi-Fi Direct so devices can connect without a wireless router?

Press the home button, select the network icon, then select Wi-Fi Direct > Start Setup. The product's connection information will appear on the LCD screen. For iOS devices, scan the QR code with your camera app; for other devices, select the Wi-Fi network name shown on the LCD screen and enter the displayed password. Wi-Fi Direct supports up to 8 connected devices. (Page 40-41)