Update README.md

README.md

@@ -58,6 +58,7 @@ On Windows, the package should be included.
 The script can be used by specifying command line parameters.
 Please run this script with the -h flag
 or without any command line parameters to display options. 
+The client can be used to send via Ethernet or serial port.
 
 GUI is work-in-progress.
 It might be necessary to set board or PC IP address if using ethernet communication.
@@ -80,7 +81,7 @@ obsw_tmtc_client.py -m 3 -s 3 --hk -c
 ```
 
 ## Modes
-There are four different modes. Run the client with the `-h` flag
+There are different modes. Run the client with the `-h` flag
 to display the modes.
 
 ## Ethernet Communication