diff --git a/README.md b/README.md
index 45df88d..5c38121 100644
--- a/README.md
+++ b/README.md
@@ -118,7 +118,7 @@ Also you'll see diagnostic messages here.<br><br>
 ## Control and usage: [remote control display](https://github.com/openhp/Display/)
 
 This is a way to control Heat Pump for the end user.<br>
-<img src="./m_display_main.jpg" width="400"><br><br>
+<img src="./m_display_main.jpg" width="300"><br><br>
 End user do not wat to know much about refrigerants, evaporation, cycles and so on, so this display designed as simple as possible. See [display page](https://github.com/openhp/Display/) for datails.<br><br>