diff --git a/README.md b/README.md
index b6aea10..ba2b760 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,9 @@
 
 ### buzzer.sh
 * polls buzzer and 2-way-switch
+* volume control
+* controls video playback
+* controls "On Air"-mode
 
 ### onair.mp4
 * placeholder videofile for "On Air"-Message