This part is a kind of semiconductor called LT505.

Function of this product has Bluetooth module.

Manufacturers : LandTang

Image and pinout :

Some of the text within the PDF file :

上海蓝唐电子科技有限公司 LandTang 蓝牙模块说明书 LT505 v 1.0 Nov 2012 Table of Contents Chapter 1 模块综述1 Chapter 2 LT505_V1.0 特性..1 Chapter 3 应用领域2 Chapter 4 模块尺寸 ...3 Chapter 5 功耗3 Chapter 6 引脚定义4 引脚描述及尺寸定义...4 Chapter 7 应用原理图..6 应� [ ... ]

LT505 PDF Datasheet Download