diff --git a/README.md b/README.md
index 2a44310..32855c5 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ License: MIT
 
 * Lets you key even if you move focus to another window
 * Works with [Vail](https://vail.woozle.org/)
-* Works with [VBand](https://hamradio.solutions/vband/)
+* Works with [VBand](https://hamradio.solutions/vband/), but the window has to remain focused
 * Optional sidetone generator, which helps with latency
 * Implements all nine keyer modes from Vail, in the adapter, so you lunatics can try to key at 50WPM with no latency issues
 * Plays received signals in the adapter, so you can turn off your computer speaker