diff --git a/README.md b/README.md
index 427f08d..8cf5659 100644
--- a/README.md
+++ b/README.md
@@ -3,4 +3,10 @@
 ESPHome powered switch to turn on/off your PC.
 
 
-![Prototype](images/prototype.jpg)
\ No newline at end of file
+![Prototype](images/prototype.jpg)
+
+## Parts
+
+- Optocoupler: EL817
+- Resistor: 
+- ESP8266-12F from AZDelivery