MediaTek.For a list of all currently documented MediaTek chipsets with specifications, see
Dual-Band Wireless-AC600 USB Adapter
"EW-7711AUC 1.0A" and "P/C = D01-123" is silkscreened on the board in the FCC photos.
A USB ID of 0b05:17d1 is found for this device within the Elecom WDC-433SU2M
- vendor driver set. This is the ID presumed to be used by this device.