This is a simple breakout for the Roving Networks Bluetoothmodule. All pertinent pins are broken out and labeled. This new version's headers are unpopulated. Check below for appropriate headers. The module from Roving Networks is powerful, small, and very easy to use. This Bluetooth module is designed to replace serial cables. The Bluetoothstack is completely encapsulated. The end user just sees serial characters being transmitted back and forth. Press the 'A' character from a terminal program on your computer and an 'A' will be pushed out the TX pin of the Bluetoothmodule. Project description, more information and ordering can be found at https://www.sparkfun.com/products/10559 RN-41 Datasheet: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Wireless/Bluetooth/rn-41-ds-v3.3r.pdf RN-41 AT Command Set: http://www.sparkfun.com/datasheets/Wireless/Bluetooth/rn-bluetooth-um.pdf PIC Example: http://www.sparkfun.com/datasheets/Wireless/Bluetooth/pic-example-1-1.pdf Tutorial: http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=65