This kit includes 1 art. UT1020 - Ultra simplebus1 audio/video module, 4 art. UT9211M - single metal Ultra button, 1 art. UT9162 – flush-mounting frame for 2 Ultra modules, 1 art. UT9221M - Full metal Ultra cap, 1 art. UT9200 - Ultra call button module, and 1 art. 1595 - 120-23VAC/33VDC power supply unit.