diff --git a/README.md b/README.md
index 16bc619a..4ffcc415 100644
--- a/README.md
+++ b/README.md
@@ -88,3 +88,12 @@ From Your Browser:
 Instruction for installing without a container on a Raspberry Pi Zero are [here](/doc/pizero.md).
 
 Instruction for installing without a container in AWS are [here](/doc/aws.md).
+
+## Audio and Video Calls
+
+Databag depends on a separate STUN/TURN relay server to provide audio and video calls. We've tested with both [cuturn](https://github.com/coturn/coturn) and [pion](https://github.com/pion/turn), but there are many other implementations. Instruction for installing a coturn server are provided here [here](https://gabrieltanner.org/blog/turn-server/).
+
+If you want to enable audio and video calls, you need setup your own relay server. For testing purposes you can however use the demo relay server:
+  - WebRTC Server URL: turn:34.210.172.114:3478?transport=udp
+  - WebRTC Username: user
+  - WebRTC Password: pass