diff --git a/ToDo.md b/ToDo.md
index 0c18ca2..8876486 100644
--- a/ToDo.md
+++ b/ToDo.md
@@ -3,6 +3,7 @@
 ## Electronics
 
 - [ ] Choose display(s)
+  - Main display: Color, 62.985mmx51.286mm (3.2")
 - [ ] which uC?
      - [ ] what kind of SW?
 - [ ] battery + loading circuit