This is a replacement battery door cover for the Nikon Coolpix 2200, 3200, and 4100 compact digital cameras.  This is a genuine Nikon part.  Note, this part is not supplied as a complete assembly, it is just the outer plastic shell of the battery door (the part that breaks).  I wish I could sell these for a dollar because that's what they should cost, but Nikon charges what they want to.  As a result some minor disassembly may be required to remove the old part and install the new one.