diff --git a/matrix/element-call/README.md b/matrix/element-call/README.md
index a7c02e7..1bb1dab 100644
--- a/matrix/element-call/README.md
+++ b/matrix/element-call/README.md
@@ -140,4 +140,20 @@ Now enable and start this thing:
 systemctl enable --now lk-jwt-service
 ```
 
+# SFU
 
+The actual SFU, Selective Forwarding Unit, is LiveKit. Downloading and
+installing is easy: download the [binary from Github](https://github.com/livekit/livekit/releases/download/v1.8.0/livekit_1.8.0_linux_amd64.tar.gz)
+ to /usr/local/bin, chown
+it to root:root and you're done.
+
+The quickest way to do precisely that, is to run the script:
+
+```
+curl -sSL https://get.livekit.io | bash
+```
+
+You can do this as a normal user, it will use sudo to do its job.
+
+Configuring this thing is [documented
+here](https://docs.livekit.io/home/self-hosting/deployment/).