If you have a Concours quality 93-95 Rolls Royce or Bentley motorcar including Turbo R, Brooklands, Corniche and Silver Spur, you will NEED this for your car.  If you have the original Alpine 7618RR tuner and cassette deck with CD shuffle then this remote was originally supplied with your motor car for use by the rear passengers.  It would be located in a small pouch on the rear of the center console.  

I have not seen one trade in years.  I only have one.  If you need it, this is it.  In original packaging, never opened and kept inside a drawer in my library, not a hot humid garage.