diff --git a/Commands.md b/Commands.md
index 878e1688..886d1bff 100644
--- a/Commands.md
+++ b/Commands.md
@@ -557,7 +557,7 @@ SerialLog       | 4              | Disable Hardware Serial Bridge and Show all m
 SerialSend      | \<text\>       | Disable Serial logging and send text to serial port ending with "\n"
 SerialSend2     | \<text\>       | Disable Serial logging and send text to serial port
 SerialSend3     | \<text\>       | Disable Serial logging, replace escape characters and send text to serial port
-SerialSend4     | \<binary\>     | Disable Serial logging and send binary data to serial port
+SerialSend4     | \<binary\>     | Disable Serial logging and send binary data to serial port. Data in serial response messages is encoded as hex strings.
 
 #### Software Serial Bridge commands
 Expect possible communication errors when additional sensors are configured.