diff --git a/PZEM-0XX.md b/PZEM-0XX.md
index 45f1fd14..9d4526e6 100644
--- a/PZEM-0XX.md
+++ b/PZEM-0XX.md
@@ -11,7 +11,7 @@
 ## PZEM-016
 
 ![](https://user-images.githubusercontent.com/5904370/67893552-0cfacb80-fb57-11e9-9a9b-67482ca905d1.png)
-- [PZEM016 Energy Monitoring](PZEM016-Energy-Monitoring)
+- [**PZEM016 Energy Monitoring**](PZEM016-Energy-Monitoring) - RS485 to TTL serial modification
 
 ## Note on Calibration
 [Per Theo](https://github.com/arendst/Tasmota/issues/3208#issuecomment-405048466) - As the PZEM is a dedicated energy monitor, device calibration in TASMOTA is currently not supported.