BLE Bee CC2541 With XBee Socket For Arduino - (AD13052)

Description:

BLE BEE is a BLE serial port module. It is based on TI's CC2541 BLE chip. With it, you can wirelessly transfer data and perform remote control. It supports both central mode and peripheral mode. And it supports remote control to the other side that is connected. You can also customize commands when combined with other devices. The BLE BEE is compatible with the XBee socket. You can just plug it into the XBee socket.

Note: It is a 3.3v serial interface, not the typical 5v as in many Arduino boards.

Reference link