diff --git a/Protocols_Details.md b/Protocols_Details.md
index bfce7cf..bf8653a 100644
--- a/Protocols_Details.md
+++ b/Protocols_Details.md
@@ -62,6 +62,11 @@ CH5|CH6
 ---|---
 BTMBTN|TOPBTN
 
+###CX20
+Model: Cheerson Cx-20
+CH5|CH6|CH7
+---|---|---
+
 ##FLYSKY AFHDS2A
 Extended limits supported