The RTK-X57™ table extension kits provide a reliable “transparent” link between the table devices and the Poly X50 and X70 . A specific microphone cable and power supply are included in the kit. The RTK-X57™ offers a cost and time saving alternative to traditional infrastructure cabling for the Poly X50 & X70. The RTK-X57™ provides power, HDMI for content, TC8 Ethernet and power, Audio I/O, USB & Poly Expansion Microphone support at distances up to 100 meters on a single CAT5e/CAT6.