This is the same product as the . The difference is this version comes in fancy clamshell packaging meant for our distributors that need it. Regular customers are welcome to order, but we want to limit the amount of extra packaging finding its way into the trash heap. Project description, more information and ordering can be found at https://www.sparkfun.com/products/10426 Datasheet: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Sensors/Magneto/HMC5883L-FDS.pdf Example code: http://sfecdn.s3.amazonaws.com/datasheets/Sensors/Magneto/HMC5883.pde Quickstart Guide: http://www.sparkfun.com/tutorials/301 Bildr Tutorial: http://bildr.org/2012/02/hmc5883l_arduino/ Digital Compass How-To Video: http://www.youtube.com/watch?v=sBKHdt0OdPg