WiFi is required to view live readings and video from the Dream Duo in the Owlet Dream App. The Cam requires a WiFi connection to stream video and audio to your smartphone. The Dream Sock and Base Station connect via Bluetooth. The Base Station then connects to your phone via WiFi to give you live readings of displayed sleep-related metrics. WiFi is required if you would like to use the Owlet Dream App to view these live readings, or to access the sleep content and expert tips. In the case that WiFi is not working, the Base Station will still prompt with music and lights when your baby needs assistance in getting back to sleep.