diff --git a/README.md b/README.md
index e3ec032..7909138 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,23 @@
 # Printscan server
-## Version 3 PROJECT
+## Version 3
 
 This repository contains files used to set up our printscan server on a freshly installed Armbian. Target is Bullseye.
 
 ### Introduction
 (see wiki for need and concept explanation)
 
-The idea behind version 3 is to replace all the scan part with [scanservjs](https://github.com/sbs20/scanservjs). This
-app would **not** be running on the same SBC, but on a dedicated applicative container.
+Version 3 implementation works roughly as follows:
+##### SBC
+* the Armbian-based device is connected to local network, and an all-in-one printer is connected to it via USB;
+* SANE and CUPS services are installed and running on the device;
+* CUPS is configured to provide a remote printer to network;
+* SANE is configured to provide network scan to a specific host only.
+
+##### Applicative container
+* this specific host is an applicative container running [scanservjs](https://github.com/sbs20/scanservjs);
+* it is configured to use the scanner provided by the SBC.
+
+### Files
+Files in this repository only cover the SBC setup.
+#### Installation
+* `setup.sh` is a script automating the installation and configuration of required software