diff --git a/wk40.md b/wk30.md
similarity index 93%
rename from wk40.md
rename to wk30.md
index e64424ec..8009af35 100644
--- a/wk40.md
+++ b/wk30.md
@@ -6,7 +6,7 @@ GND - GND
 GPIO0 - GND
 
 ### Additional Information
-This device is available on Amazon as "Smart WiFi Plug Outlet Mini with Energy Monitoring." The product number, WK40 appears nowhere on the page on Amazon, so here's its ASIN: B07C326VKR
+This device is available on Amazon as "Smart WiFi Plug Outlet Mini with Energy Monitoring." The product number, WK30 appears nowhere on the page on Amazon, so here's its ASIN: B07C326VKR
 
 It remains to be seen if this device actually features energy monitoring as in the title on Amazon.