Router connection question

My Router is upstairs and my entertainment system is downstairs. Is there anyway I can use my Vault2i? Can I just do setup in direct connection and access the CD’s I’ve ripped offline? Can Bluetooth connect to my Stereo downstairs while leaving the vault upstairs connected by hardwire? Can I, after set up, connect the vault to my router just through Wi-Fi? I didn’t realize that I needed a hardwired connection as the product said it was Bluetooth and Wi-Fi compatible