diff --git a/readme.md b/readme.md
index b770fbe..bfd7fbd 100644
--- a/readme.md
+++ b/readme.md
@@ -5,7 +5,7 @@ I built this because I needed a lab power supply and all the lab power supplies
 
 ## Supplies.
 - SK-60 or SK-120 buck boost converter
-- 60 watt usb-c pd power supply
+- 60 watt usb-c pd power supply (or 120 watt depending on which buck boost converter you have)
 - 4mm banana female plugs
 - Wires