This device was under short-term confidentiality, but that expired 05/07/2018.
Supposedly contains 2 antennas, possibly for RF4CE. This device does not appear to support Wi-Fi.
Test Report DTS doc says, "The Spectrum product line includes the Spectrum 210A and Spectrum 210A. Both products are video home set tops with a wideband QAM tuner capable of up to 4 tunes. Video display capability is max 1080P60. Both products have fully compliant Docsis 3.0 embedded cable modems. The Spectrum 110A is capable of pause/live TV with internal SD card. The Spectrum 210A is capable of up to 4 DVR recordings with included HDD. Both products have capsense menu keys with Bluetooth and RF4CE wireless technologies."
It probably says "210A" twice after they did a find/replace from the document for the Arris Spectrum110-A. The Spectrum210-A appears to be a bit larger than the Spectrum 110-A, likely to make room for extra internal DVR storage.