Watching this tutorial video, you will be able to use your 1-way videokit 1SEPG Pluggy technology for a 2-way application with intercommunication service (1 SE7PG Pluggy monitor is needed, of course). In order to get it easier, we have not used the video distributor that we suggest for real installation. For further information on Pluggy go to https://www.farfisa.com/en/two-wires-pluggy.html