ITEAD Bluetooth Wireless BT Module Shield Kit For Arduino Starter

SparkFun Bluetooth Modem - BlueSMiRF Silver

Sparkfun Modem Bluetooth - BlueSMiRF Gold

BTBee Pro is a Bluetooth serial port module that can be compatible with shields that have XBee socket.

The BLE shield has the function of adapting low-power Bluetooth as a serial port , which are specifically designed for Arduino boards and compatible boards, simple to use, simply connect and a ready is ready to be used.

ITDB031 is a serial port BLE Module. It is based on TI's CC2541 BLE chip. With it, you can transfer data wirelessly and do remote control. It supports central and peripheral modes. And it supports remote control for the other side that is connected. You can also support custom commands when you combine it with other devices. BLE Bee is compatible with XBee. You can simply connect it to XBee.

Note: The serial interface is 3.3V, not the typical 5V, as with many Arduino boards.