Good luck with installation.  The backing plate does not fit any known American electrical box.  Screw hole do not align with a crossbar.  Drill a couple holes, OK.  But the real problem is the lead wires are so short that when connected there is not enough clearance to attach the mirror to the backing.  OK, put the nuts in the box.  But then it's impossible to screw in the backing plate.  I guess I'll make a medallion.  Big hassle.  If I had not thrown out the boxes, this thing would be going back in pieces.