This is a raspberry pi 3 unit that has Raspian installed.It also then has the Jishi node-sonos-http-api installed on here ready to go aswell as a file server for you guys to store your music files.This can then be used by the HC3/HC3L to control your Sonos System and store your music centrally on the network.See YouTube channel for installation guideHEREPS the node-sonos-http-api is freely available on the net with guides. You are purchasing the Pi plus my time taken to create a ready to use solution.Please note these are now the updated encrypted QA files