This is an evaluation board for the Silicon Laboratories Si4703 FM tuner chip includes an amp and a headphone jack, and that's everything you need to get up and running! Beyond being a simple FM radio, the Si4703 is also capable of detecting and processing both Radio Data Service (RDS) and Radio Broadcast Data Service (RBDS) information. The Si4703 even does a very good job of filtering and carrier detection. It also enables data such as the station ID and song name to be displayed to the user. Project description, more information and ordering can be found at https://www.sparkfun.com/products/10344 Datasheet: http://www.sparkfun.com/datasheets/BreakoutBoards/Si4702-03-C19-1.pdf Datasheet: http://www.sparkfun.com/datasheets/BreakoutBoards/tpa6111a2.pdf Quickstart Guide: http://www.sparkfun.com/tutorials/293 Arduino Example Code: http://www.sparkfun.com/datasheets/BreakoutBoards/Si4703_Example.pde Arduino Library: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/BreakoutBoards/Si4703_Breakout-Arduino_1_compatible.zip Programming Guide: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/BreakoutBoards/AN230_0.61.pdf