This is the same product as the , but also includes an and headers. The difference is, this version comes in fancy clamshell packaging meant for our distributors. Regular customers are welcome to order, but we want to limit the amount of extra packaging finding its way into the trash heap. A and a are available for this product. Project description, more information and ordering can be found at https://www.sparkfun.com/products/10346 GPS Shield: http://www.sparkfun.com/commerce/product_info.php?products_id=10102 EM-406A SiRF III GPS Receiver: http://www.sparkfun.com/commerce/product_info.php?products_id=465 Stackable Headers 6-pin: http://www.sparkfun.com/commerce/product_info.php?products_id=9280 Stackable Headers 8-pin: http://www.sparkfun.com/commerce/product_info.php?products_id=9279 GPS Quickstart Guide: http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=173 Assembly Guide: http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=184 Example Sketch: http://www.sparkfun.com/tutorial/GPSQuickStart/gps_parsing_v12ii.pde EM-406A Datasheet: http://www.sparkfun.com/datasheets/GPS/EM-406A_User_Manual.PDF NMEA Reference Manual: http://www.sparkfun.com/datasheets/GPS/NMEA%20Reference%20Manual1.pdf