diff --git a/Sonoff-Dual.md b/Sonoff-Dual.md
index 4f407c37..ff27827f 100644
--- a/Sonoff-Dual.md
+++ b/Sonoff-Dual.md
@@ -7,4 +7,6 @@ It is therefore important to disable any serial communication to and from the de
 
 To assist easy installation serial logging is enabled by default in user_config.h for all Sonoffs. Once in production it's wise to turn it off for all Sonoffs. For the Dual it is almost mandatory to turn it off.
 
-Execute command ```seriallog 0``` once to turn all communication on the serial port off.
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+Execute command ```seriallog 0``` once to turn all communication on the serial port off.
+
+If within 10 minutes no input is received serial communication is turned off too. 
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