This part is a kind of semiconductor called AP6356.
Function of this product has 2x2 WiFi + Bluetooth4.1 Module.
Manufacturers : AMPAK
Image and pinout :

Some of the text within the PDF file :
正基科技股份有限公司 SPECIFICATION SPEC. NO.: REV: 1.0 DATE: 07. 25.2014 PRODUCT NAME: AP6356 APPROVED CHECKED PREPARED DCC ISSUE NAME AMPAK Technology Inc. www.ampak.com.tw Doc. NO: Proprietary & Confidential Information AMPAK AP6356 2x2 WiFi + Bluetooth4.1 Module Spec Sheet AMPAK Technology Inc. www.ampak.com.tw Doc. NO: Proprietary & Confidential Information Revision History Date Revision Content 2014/07/25 -Preliminary Revised By Version Brian 1.0 AMPAK Technology Inc. www.ampak.com.tw Doc. NO: Proprietary & Confidential Information 1 AP6356 Datasheet Contents Contents ... 2 1. Introduction. [ ... ]
AP6356 PDF Datasheet Download
