This part is a kind of semiconductor called RTL8188EUS.

Function of this product has WLAN 11b/g/n WIFI Module.

Manufacturers : ETC

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Some of the text within the PDF file :

ÉîÛÚÊÐÎÞÏË«Ó®¿Æ¼¹¾ Product Specification RTL8188EUS WLAN 11b/g/n WIFI Module(1T1R) Version A1.0 History Document Release Version A1.0 Date 2012/07/11 Modification First version Initials Eddy Approved ÉîÛÚÊÐÎÞÏË«Ó®¿Æ¼¹¾ Overview RLT8188EUS is a WLAN 11n USB module, which fully supports the features and functional compliance of IEEE 802.11n,e and i standards. It supports up to150Mbps high-speed wireless network connections. It is designed to provide excellent performance with low power consumption and enhance the advantages of robust system and cost-effective. It is targeted at competitive superior performance, better power management applications. Product block diagram ÉîÛÚÊÐÎÞÏË«Ó®¿Æ¼¹¾ Features Operates in 2.4 GHz frequency band [ ... ]

RTL8188EUS PDF Datasheet Download