This is a replica of Dax-ur's Kryptonian Beacon which was lost by Dax-ur a Kryptonian which came to earth many years ago while holding the beacon and saying the name of the kryptonian you will be insantly transported to him can be seen in episodes 3 and 10 in season 7 screencap with Dax-ur (Marc McClure - Jimmy olsen in the superman movies and supergirl movie)
Dax-ur was a scientist who was studying the effect of the yellow sun on Kryptonian minerals. He also created the Brain InterActive Construct (Brainiac) . When he realized his creation could cause mass destruction, he exiled himself to Earth and bound his powers by the use of blue kryptonite.
