The BTM-182 module is a versatile and inexpensive bluetooth device. It is a Class 2 module with printed pcb
antenna, Bluetooth standard Ver. 2.0 + EDR compliant. Low current consumption, 3.0V or 1.8V operation.
Possible Interfaces: USB, UART & PCM (for voice CODEC), RoHS compliant. Small outline. 25.0x14.5x2.2 mm.
The BTM-182 is available from several suppliers including www.sparkfun.com

Default RS232 parameters:
Baud 19200
Data bits 8
Parity None
Stop Bits 1
(these can be changed ia the AT commands)

BTM-182 Documentation

Defaults:
 Device Name: Serial Adapter
PIN: 1234
(these can be changed ia the AT commands)

BT3V kit documentaion

BT3VK Includes the pcb and 2 smd capacitors. Also included are 4 optional 10k pull-up resistors. Sold as a kit and requires soldering the parts.

Order: BT3VK $12 kit BTM-182 module not included

Order: BTM182K3V $27 kit Includes the BTM-182 module

BT5VK Includes the pcb and 3.3v regulator, 2 MOSFETs, 6 10k resistors, 10uf cap and a 0.1uf cap. Sold as a kit and requires soldering the parts. The BTM-182 module is not included.

BT5V kit documentation

Order: BTM182K5V $30 kit of all parts Includes the BTM-182 module