diff --git a/Readme.md b/Readme.md
index dc226ff..d7fcf67 100644
--- a/Readme.md
+++ b/Readme.md
@@ -1,6 +1,6 @@
 # U2FDevice
 
-[TOC]
+This program uses a Raspberry Pi 0 to act as a [U2F token](https://www.yubico.com/solutions/fido-u2f/). This permits any person with a Raspberry Pi 0 to try out U2F 2FA for themselves.
 
 # Required materials
 
@@ -281,4 +281,4 @@ The next level above that is the actual `U2F` protocol. The most recent specific
   * /tmp/devPackets.html
   * /tmp/devAPDU.html
   * /tmp/hostPackets.html
-  * /tmp/hostAPDU.html
\ No newline at end of file
+  * /tmp/hostAPDU.html