Update README.md

README.md

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 This plugin allows you to connect your Stream Deck, Stream Deck Mini or Stream Deck XL to Macro Deck!
 
 ## Important
+- You need to own a Stream Deck to use this plugin
 - The official Stream Deck software must be closed
 - This software is independent of the official Stream Deck software. You don't even have to install it.
 
 
 ![funktionsgrafik](https://user-images.githubusercontent.com/45011179/176490015-28795388-1271-4c46-8e99-961610be5b44.png)
 
+
 ## Features
 - Independent
 - Hot-plugging
 - Multiple devices connected at once
 - Animated icons
 - Short press/long press
 
+## Compatibility
+- Stream Deck original (Not tested)
+- Stream Deck mk.2 (Tested, works)
+- Stream Deck Mini (Not tested)
+- Stream Deck XL (Not tested)
+
+
+If you own a Stream Deck which is not tested, please contact me and let me know if it works
+
+
 ## Installation
 1. Connect your Stream Deck (Mini/XL)
 2. Make sure, the official Stream Deck software is closed