diff --git a/README.md b/README.md
index a854d60..3d2c3d3 100644
--- a/README.md
+++ b/README.md
@@ -98,6 +98,10 @@ You may prefer to solder the wires over using connectors. But in this case, it w
{-Photo: T sensors with abbreviations and full names-}
{-Photo: RS485 and 12V power for display-}
{-Photo: all together-}
+And one more: **remember about 230V inside!** Do not turn on the phase without need.
+Have you ever recieved 230V with your hands? If yes - you know. If no - do not try.
+Also, remember about animals and children, before installing permanently.
+
## Sensors installation
{-Photo: power wire + SCT013-}