Can you connect two Behringer XR18?
No, you can not daisy chains the Behringer XR18.
How do I pair my Behringer XR18?
Start the Settings/Wireless & Networks dialog on your Android device and switch Wifi on. Click on Wifi to select a network. From the lists of networks, select your X Air mixer's name (e.g. XR18-19-1B-07). After a few seconds, the status should change to Connected.