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TP-LINK RE500 v1.x
AC1900 Wi-Fi Range Extender
"1607132650-1.0-A Rev1.0sp3" is silkscreened on the board in the FCC photos.
FCC docs cover the TP-LINK RE650 v1.x and the RE500. Test Report DTS says, "There is nothing different of two models, just for different marketing use." This RE500 might be limited to three-stream operation in software.
Web GUI: http://tplinkrepeater.net