diff --git a/README.md b/README.md
index 194d8c7..1da52d2 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,9 @@
 # cleanfilenames
 
-A tool to clean up strange filenames
\ No newline at end of file
+A primitve tool to clean up strange filenames
+It works on a whitelist of accepted chars, doesn't do any recursion an never overwrites anything.
+
+```
+cleanfilenames.py ~/Music/
+```
+That's it