diff --git a/README.md b/README.md
index 73b57fb..c778e1c 100644
--- a/README.md
+++ b/README.md
@@ -431,6 +431,7 @@ Models: MT99xx
 Models: Eachine H7
 #####Sub_protocol YZ
 Models: Yi Zhan i6S
+Only one model can be flown at the same time since the ID is hardcoded.
 
 ####SLT
 Autobind protocol