This part is a kind of semiconductor called QCA9880.

Function of this product has 802.11ac/n/a single band 3x3 PCIe mini card.

Manufacturers : Unex Technology

Image and pinout :

Some of the text within the PDF file :

802.11ac/n/a single band 3x3 PCIe mini card, QCA9880 Model: DAXA-O1 DAXA-O1 is a 3x3 802.11ac/n/a wifi module in standard PCIe mini card form factor designed to deliver up to 1.3Gbps wireless data rates and target next-generation dual-band, dual-concurrent (DBDC) home and enterprise wireless access points for a variety of high-reliable and bandwidthintensive video-over-wireless applications. Unique Front End Module design allows co-located 5GHz RF standing up to -3dBm power injection from 2.4GHz to provide non-degraded Rx sensitivity on dual-band, dual-concurrent (DBDC) implementation. A new, highly efficient architecture reduces processing requirements and power consumption, while nearly tripling wireless performance of 802.11n 3x3, to enable broad adoption of home and enterprise wirele [ ... ]

QCA9880 PDF Datasheet Download