diff --git a/README.md b/README.md
index ef460ab..4537a2d 100644
--- a/README.md
+++ b/README.md
@@ -16,4 +16,6 @@ screen logger on a single screen.
 The "Do nothing if already running" option silently stops the program at 
 start up if another copy is already running.
 
+The app can, optionally, also display power efficiency, gain, and SWR.
+
 For more information, visit www.sm7iun.se
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