diff --git a/README.md b/README.md
index f23a2e0..88ce2df 100644
--- a/README.md
+++ b/README.md
@@ -73,6 +73,7 @@ The tester checks if all are present.
 There is one wire going from CC1 on one side of the connector, to CC1 on the other side of the connector.
 Since the plug on both sides is reversible, there are 4 possible permutations.
 This pin is actually used to determine the orientation of the plug, and do the date signal switching on the right pins.
+Which of both LEDs is on also depends on the plug orientation.
 
 - eMarker: indicates if the cable is electronically marked.
 The detection is the complicated part of this design.