diff --git a/README.md b/README.md
index ea3e178..12b27d2 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,11 @@ The actual node can be one of the LoRa CubeCell nodes by Heltec Automation: http
 
 Notes:
 
+Will repeat packets ONCE. To prevent flooding a short list of received packet IDs is checked against the ID of the current packet.
+Keep in mind that re-sending packets will cause the initial sender to assume that the packet is "received" or at least in the mesh.
+If no other meshtastic node is in range of either the node or the repeater, the message will still be shown as received. 
+You can use this for range tests.
+
 Will work only for the channel "Default" with setting "Very long range (but slow)"!
 Modify radio settings for your own channels.