SD 2C2B -Polaris RZR Stereo System UTV Side by Side (2-6.5" marine speakers)
Overall, i love this set up, only complaint i have is i broke the cover day one, it was very brittle and it flips down.  I bought this product to replace: http://www.amazon.com/gp/product/B0017TXE38/ref=oh_details_o03_s00_i00?ie=UTF8&psc=1 and now it flips up out of the way and works fantastic.  For the money, its the best buy i have found anywhere on the internet for a RZR.