diff --git a/Hardware_developement/2-GUI/Readme.txt b/Hardware_developement/2-GUI/Readme.txt
index 3f9964c..b90acc8 100644
--- a/Hardware_developement/2-GUI/Readme.txt
+++ b/Hardware_developement/2-GUI/Readme.txt
@@ -1 +1 @@
-Currently, power is supplied from one or two Li-Ion 3.7V batteries in series. 
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+Essential part of GUI is LCD. Currently, it is considered together with controller. See section 3-Controllers.
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