diff --git a/X-Arcade/README.md b/X-Arcade/README.md
index 24c1bb1..2b94a19 100644
--- a/X-Arcade/README.md
+++ b/X-Arcade/README.md
@@ -18,3 +18,5 @@ PS2KeyRaw
 Arduino Pro Micro (select Arduino Leonardo from Arduino IDE).
 
 PS/2 keyboard not needed.
+
+Takes only about 10mA.