RT-21 Ethernet Kit for V4
Internal WiFi Webserver Kit for RT-21 V4 units Only
This option adds Ethernet connected embedded Webserver and direct TCP access for a V4 RT-21. Unit must have s/n above 4000 AND the chassis must have the cutout on the rear to accommodate the Ethernet connector on the rear. A black plastic cap covers this cutout if it exists. See the v4 manual addendum for more information on this option.