diff --git a/README.md b/README.md
index 759824b..bf1a438 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,8 @@
 # epsolar-tracer
 Tools for EPsolar Tracer solar charge controller
 
+Linux driver for Exar USB UART
+xr_usb_serial_common-1a
+https://www.exar.com/common/content/default.aspx?id=10296
+
+