diff --git a/ST-Link-Setup.md b/ST-Link-Setup.md
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+++ b/ST-Link-Setup.md
@@ -1,5 +1,7 @@
 ## STLinkV2 Setup
 
+STLink's are device programmers needed to load the USB Bootloader or for development and debugging. If your BlueSCSI has USB capability you do not need this.
+
 Be sure to buy the "Clone" STLink V2 programmer - the official STLink programmer does not work.
 
 ![160190399-a3275132-822e-42ad-894b-af20bde0e57f](https://user-images.githubusercontent.com/271734/164898258-486fe205-61c5-46ff-8f4a-fc5a6342da8e.png)