diff --git a/README.md b/README.md
index 0d75b63..0719c77 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ Known supported units:
 - HCV300 ALU
 - HCV500 ALU
 - HCV700 ALU
-- HCV400 P2
+- HCV400 P1-E1/P2
 - HCV460 P2/E1
 - RCV320 P1/P2
 - HCH5 MKII