diff --git a/posts/2021-01-08_kvm-usb-auto-passthrough.yaml b/posts/2021-01-08_kvm-usb-auto-passthrough.yaml
index 8991f2a..7c36ca7 100644
--- a/posts/2021-01-08_kvm-usb-auto-passthrough.yaml
+++ b/posts/2021-01-08_kvm-usb-auto-passthrough.yaml
@@ -40,6 +40,9 @@ ACTION=="remove", \
 	RUN+="/usr/local/bin/kvm-udev detach steam"
 ```
 
+The VENDOR_ID and MODEL_ID can be found by running the `lsusb` command, which
+shows this as "ID <vendor id>:<model id>", for example "ID 6b62:6869".
+
 And of course, here's the script `/usr/local/bin/kvm-udev` which takes care of
 the auto-connecting. It takes two parameters, first either being "attach" or
 "detach" and the second being the name of the KVM domain (aka VM).