diff --git a/README.md b/README.md
index ba2b760..0133e1c 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,14 @@
 * polls big button (buzzer) in left of lounge door
 * polls 2-way-switch left from big button (buzzer)
 
+## Usage instructions
+### Buzzer commands
+* button press (2s delay between presses) start or stop video
+* switch up turns on "On Air"-mode (stops video and doesn't open new videos, button locked)
+* switch down turns sound on, volume rises slowly and can be stopped with button press
+* turn switch back from down to center position slowly decreases volume, it can be stopped when switch turned down again
+
+
 ## Filelist
 ### RandomVideo.sh
 * Plays a random video file