The detailed terms and conditions of Ooma's products, services, and support are fully set forth in the Terms and Conditions, available online under the "legal" tab on the bottom navigation bar of the Ooma Web site.
Clearly, that "e-reader" is really a 10-inch Galaxy Tab: It's making a video call (not something you'd do on, say, a Kindle) and it has the same row of buttons on the bottom bezel as the smaller 7-inch Tab.