PiJack set up is easy, here's what you need to do:
Step 1: Check your Raspberry Pi Zero
If your Pi Zero has male headers fitted as the GPIO pins then you're ready to go!
Step 2: Install the latest Raspbian
PiJack works best with the latest version of Raspbian, so grab the latest version from the Raspbian site and follow their instructions to install to your micro SD card.
Step 3: Connect PiJack to your Pi Zero
Just line up PiJack and push on to your Zero's GPIO header pins.
Step 4: Plug in and get online!
Connect PiJack to your router or Ethernet switch using a standard Ethernet cable. Power the Raspberry Pi up. Raspbian will detect the PiJack and will automagically get an IP address from your network using DHCP. Follow the Raspberry Pi Foundation's instructions to find your new IP address.
You're online with PiJack!