diff --git a/HID-lights.md b/HID-lights.md
index e8f91d2..c305d90 100644
--- a/HID-lights.md
+++ b/HID-lights.md
@@ -8,6 +8,10 @@ The [HID usage spec](https://www.usb.org/sites/default/files/hut1_6.pdf) is main
 
 For lights, the `LED Page (0x08)` is the most commonly used, but you are not limited to those.
 
+## Dumping USB capabilities
+
+Launch `spice.exe -cfg -sysdump all` to show a dump of HID devices detected by spice.
+
 ## Sample code
 
 Arduino code in [UltimatePopnController](https://github.com/CrazyRedMachine/UltimatePopnController/blob/master/popnController/POPNHID.cpp)