diff --git a/docs/micromate_protocol_reference.md b/docs/micromate_protocol_reference.md
index f2c5bb3..b9e8610 100644
--- a/docs/micromate_protocol_reference.md
+++ b/docs/micromate_protocol_reference.md
@@ -2111,6 +2111,9 @@ So both types are in circulation and indistinguishable by eye.  A unit handed th
 wrong one has no working modem port, and nothing about the cable's appearance
 says so.
 
+**The cable on the bench during this investigation was confirmed to be a Benfei**
+— the Prolific one.
+
 ⚠ **Identify cables by chipset, not by looks.**  `lsusb` on any Linux box:
 FTDI is VID `0403`, Prolific is `067b`.  Note also that counterfeit FTDI chips
 are common in cheap cables — they carry FTDI's VID but may not behave like one,