TP-LINK TD-W8970 v3

Product page

V3 Datasheet


 * Antenna: 2x 5dBi @2.4GHz
 * USB port: 1x USB 2.0

"2011500170" is silkscreened on the board in the FCC photos.

Unk. chipset. Possibly fully Broadcom based?

Pinout
The pinout would appear to be the following... J3 [TxD] (RxD) (GND) (3.3) v
 * to USB port
 * to USB port

(Hint:You have to short two missing resistors beside Tx & Rx as shown in fcc photos of refernce board.)