diff --git a/README.md b/README.md
index de108a5..4cd6c1a 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,7 @@
 tnc1-android-config
 ===================
 
-Mobilinkd TNC1 configuration tool for Android
+Mobilinkd TNC configuration tool for Android.  Supports TNC1, TNC2 and TNC3.
+This app is used to configure the TNC input and output levels, DSP, KISS
+parameters and power settings.
+