Update README.md

README.md

@@ -17,8 +17,15 @@ Platform | Description
 `event`  | Event Triggers from (learned) Remotes
 `service` | Service call for each Remote to send IR commands
 
+## Requirements
+iRTrans appliances are devices which are able to send and receive (and to learn) IR (infrared) signals.
+For more details see [here](http://www.irtrans.de/en/shop/lan.php).
+This integration supports only so called `LAN` devices (which have an Ethernet or WiFi connection).
+It has been tested with a device with IR Database and works probaly just with such a device.
+Learning of IR signals is not (yet) supported. There are good [applications](http://www.irtrans.de/en/download/) from iRTrans GmbH to do this.
+
 ## How it works
-This integration adds support for [iRTrans Ethernet devices](http://www.irtrans.de/en/shop/lan.php) to Home Assistant. For now it has been testet with *iRTrans LAN DB (with database) devices* only. The communication with the iRTrans device follows [these API rules](https://www.irtrans.de/download/Docs/iRTrans%20TCP%20ASCII%20Interface_EN.pdf).
+The communication with the iRTrans device follows [these API rules](https://www.irtrans.de/download/Docs/iRTrans%20TCP%20ASCII%20Interface_EN.pdf).
 
 The basic procedure works as follows: