diff --git a/README.md b/README.md
index 46192f7..0a5f982 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,8 @@
 
 Warning: this is a proof of concept, don't rely on it
 
-I didn't even test it yet so no idea if it works
+It was very basically tested, and while it seems to work, approach it without any expectations.
+In other words - treat it as a toy, not as a tool that will save your life or valuables, because it probably won't.
 
 ## Usage
 
@@ -66,10 +67,41 @@ Supported types are:
  - `partition-with-violated-zones`
  - `zone-isolate`
 
-### Filtering events by index (I guess "zone", but I'm not sure)
+### Filtering events by index (which meaning depends on the change type)
 
 Use the `--allowed-indexes=1,2,3,...` command line parameter to set the list of allowed indexes (of course provide your own list instead of `1,2,3,...`). If that parameter is not provided, then all indexes are allowed; otherwise the notification is sent for all indexes.
 
+## example systemd unit
+
+```
+[Unit]
+Description=Satel Alarm Telegram Status Notifier
+Requires=network.target
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=/path/to/alarm_bot --satel-addr=192.168.13.37 --satel-port=7094 --tg-chat-id=1234,4567,9876
+Environment=TELEGRAM_APITOKEN=YOUR_API_TOKEN
+Environment=NOTIFY_URL_DISARM="http://localhost/disarmed"
+Environment=NOTIFY_URL_ARM="http://localhost/armed"
+DynamicUser=True
+RuntimeDirectory=hswro-alarm-bot
+StateDirectory=hswro-alarm-bot
+RestartSec=30
+Restart=on-failure
+
+CPUAccounting=true
+CPUQuota=5%
+MemoryAccounting=true
+MemoryHigh=25M
+MemoryMax=50M
+
+[Install]
+WantedBy=multi-user.target
+
+```
+
 ## Debugging
 
 Set the `OMIT_TG` environment variable to, well, omit sending anything over to Telegram and just see the logs instead.