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/11389 Datasheet (RN-131C): http://www.sparkfun.com/datasheets/Wireless/WiFi/rn-131-ds.pdf Reference Guide (RN-131C): http://www.sparkfun.com/datasheets/Wireless/WiFi/WiFlyGSX-um2.pdf SC16IS750 Datasheet: http://www.sparkfun.com/datasheets/Components/SMD/SC16IS740_750_760.pdf Talking Wireless Server Tutorial: http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=158 Experimental WiFly Arduino Library: http://forum.sparkfun.com/viewtopic.php?p=115626#p115626 WiFly Troubleshooting: http://forum.sparkfun.com/viewtopic.php?f=32&t=25129 Wireless Water Sensor Project: http://lifeboat.co.nz/the-finished-wireless-water-sensor/ WiFly Library (Arduino 1.0): https://github.com/jmr13031/WiFly-Shield