Found this link, should have been confidential, well... http://pages.email.technicolor.com/customers51.html
It will have the same specs as the AirTV from Dish (Technicolor), should look different though.
As seen below :
To help maximize the availability of this popular service package, AT&T decided to partner with a supplier to provide the highest quality OTT device directly to the end user.
The Indigo set-top box offers the end user a compact OTT device that combines linear sports content with OTT services such as YouTube and Netflix. It features Android 7.0 “Nougat” software, Dual Band 2x2 802.11ac Wi-Fi, and Bluetooth. We also bundle a Technicolor specified voice remote which also controls TV On/Off and volume.
Integrated with Android TV, this product is easy for AT&T to customize to their brand and provides the end user with the capability to enjoy the highest quality 4K content. AT&T plans to offer this device with their DIRECTV NOW service launched in November 2016.