diff --git a/OPERATIONS.md b/OPERATIONS.md
index f4fd297..0943027 100644
--- a/OPERATIONS.md
+++ b/OPERATIONS.md
@@ -94,10 +94,23 @@ curl -X POST http://localhost:8888/notify \
   -d '{
     "message": "Speaking at a different rate",
     "rate": 200,
-    "voice": "en_US-lessac-medium"
+    "voice": "en_US-lessac-high"
   }'
 ```
 
+### Example: Urgent Message (Higher Volume)
+
+```bash
+curl -X POST http://localhost:8888/notify \
+  -H 'Content-Type: application/json' \
+  -d '{
+    "message": "Critical alert! Immediate attention required.",
+    "urgent": true
+  }'
+```
+
+The `urgent` flag plays audio at 1.5x volume for critical messages.
+
 ## Configuration
 
 Configuration is via environment variables. Edit the service file or create a `.env` file: