diff --git a/README.rst b/README.rst
index 0d1fa9b..063b6df 100644
--- a/README.rst
+++ b/README.rst
@@ -88,23 +88,25 @@ Supports **Mode-S Beast** and **AVR** raw stream
 
 ::
 
-  modeslive --server [server_address] --port [tcp_port] --rawtype [beast,avr,skysense] --latlon [lat] [lon]  --dumpto [folder]
+  modeslive --source tcp --server [server_address] --port [tcp_port] \
+    --rawtype [beast,avr,skysense] --latlon [lat] [lon]  --dumpto [folder]
 
   Arguments:
     -h, --help           show this help message and exit
+    --source SOURCE      data source: rtlsdr or tcp
     --server SERVER      server address or IP
     --port PORT          raw data port
-    --rawtype RAWTYPE    beast, avr or skysense
+    --rawtype RAWTYPE    TCP data format: beast, avr or skysense
     --latlon LAT LON     receiver position
     --show-uncertainty   display uncertaint values, default off
     --dumpto             folder to dump decoded output
 
 
-If you have a RTL-SDR receiver or Mode-S Beast, use modesmixer2 (http://xdeco.org/?page_id=48) to create raw beast TCP stream:
+[experimental] If you have a RTL-SDR receiver, you can connect it directly to pyModeS:
 
 ::
 
-  $ modesmixer2 --inSeriel port[:speed[:flow_control]] --outServer beast:[tcp_port]
+  $ modeslive --source rtlsdr --latlon [lat] [lon]
 
 Example screenshot: