Linksys RE6400

Overview
The same hardware is used for this device and the Linksys RE6300 which is limited to single-stream 802.11ac operation.

Chip IDs in the FCC photos are illegible. Some details taken from this thread for the RE6300 on the DD-WRT forums. The U-MEDIA part number 0500- is obscured by the ethernet port.
 * A label affixed to the FCC EUT indicates the internal U-MEDIA model is WST-C43L E00 R01

- Access Point for Home or Small Office (Wireless Router) - Game Console or Game Console Adapter