diff --git a/README.md b/README.md
index 6cfd46b..bd61305 100644
--- a/README.md
+++ b/README.md
@@ -91,7 +91,7 @@ HOT tip! Enable the built in logger and check the output, it can be very useful
 
 The 'LGTV companion.exe" also accepts command line arguments for integration in scripts or similar.
 
-*LGTV Companion.exe -[poweron|poweroff|screenon|screenoff|autoenable|autodisable|sethdmi1|sethdmi2|sethdmi3|sethdmi4|idle|unidle] [Device1|Name] [Device2|Name] ... [DeviceX|Name]*
+*LGTV Companion.exe -[idle|-unidle][poweron|poweroff|screenon|screenoff|autoenable|autodisable|sethdmi1|sethdmi2|sethdmi3|sethdmi4|mute|unmute] [Device1|Name] [Device2|Name] ... [DeviceX|Name]*
 - *-poweron* - power on a device.
 - *-poweroff* - power off a device
 - *-screenon* - power on and enable the emitters, i e disable internal power saving mode and do not blank screen.
@@ -100,6 +100,8 @@ The 'LGTV companion.exe" also accepts command line arguments for integration in
 - *-sethdmi2* - set HDMI input 2
 - *-sethdmi3* - set HDMI input 3
 - *-sethdmi4* - set HDMI input 4
+- *-mute* - mute the built-in-speakers of a device
+- *-unmute* - unmute the built-in-speakers of a device
 - *-autoenable* - temporarily enable the automatic management of a device, i.e. to respond to power events. This is effective until next restart of the service. (I personally use this for my home automation system).
 - *-autodisable* - temporarily disable the automatic management of a device, i.e. to respond to power events. This is effective until next restart of the service. 
 - *-idle* - enable user idle mode. This is a global setting.