Thinkmart M-1200Y

The appearance is identical to the Thinkmart TM-1200A on Amazon (B07CGNSMCJ).
 * FCC external photos appear to show a Thinkmart branded device.

"We, Shenzhen Xunman Technology Co., Ltd. (USB WiFi adapter) Trademark: N/A
 * Model Number: M-1200Y, M-1200Z, M-1200W, M-1200P, M-1200L.

All model’s the function, software and electric circuit are the same,
 * only with a product color and model named different.

Test sample model: M-1200Y" - Model Difference Declaration

The chip ID is not legible in the FCC internal photos so it is a guess based on the specs
 * and the presence of Realtek driver installation screenshots in the user manual.

The package type appears to be BGA which suggests that the chip is a RTL8812BU instead
 * of a RTL8812AU which is QFN.

It is not clear where the second antenna which enables AC1200 speeds, if any, is located.