I was wondering the Button was configured for WiFi access. It's more interesting than I though. It's configured by running a Dash Button app on your Android or Apple smart phone.

The Android version works about as I would have guessed, by using the Dash Button as an access point, and the app helps you connect to it. But the Apple version communicates with the phone by ultrasonic tones!

https://www.amazon.com/gp/help/customer/display.html?nodeId=...