diff --git a/Hardware/Hellen/Hellen72.md b/Hardware/Hellen/Hellen72.md
index 4dfaa5a9..b4f3055e 100644
--- a/Hardware/Hellen/Hellen72.md
+++ b/Hardware/Hellen/Hellen72.md
@@ -2,6 +2,7 @@
 
 * knock detection module
 * build-in WBO
+* Two auxiliary low side outputs