diff --git a/README.md b/README.md
index 55e2bbb..f8d9447 100644
--- a/README.md
+++ b/README.md
@@ -15,10 +15,10 @@ const echo = (x) => x
 const server = new Backend.RPCServer(20000, [{
     name: 'HelloWorldRPCGroup',
     exportRPCs: ()  => [
-        echo,
-        function echof(x){ return x },
+        echo, //named function variable
+        function echof(x){ return x }, //named function
         {
-            name: 'echoExplicit',
+            name: 'echoExplicit', //describing object
             call: async (x) => x
         }
     ]
@@ -31,10 +31,37 @@ client.connect().then(async () => {
     const r1 = await client['HelloWorldRPCGroup'].echof('World')
     const r2 = await client['HelloWorldRPCGroup'].echoExplicit('RPC!')
 
-    console.log(r0,r1,r2)
+    console.log(r0,r1,r2) //Hello World RPC!
 })
 
 ```
 
+# Using callbacks
+
+rpclibrary offers a special type of call that can be used with callbacks
+
+```typescript
+import {Backend, Frontend, Utils} from 'rpclibrary'
+
+const callbacks:Function[] = []
+const callbackserver = new Backend.RPCServer(20000, [{
+    name: 'HelloWorldRPCGroup',
+    exportRPCs: ()  => [
+        function  triggerCallbacks(message){ callbacks.forEach(cb => cb(message)) },
+        {
+            name: 'subscribe',
+            hook: async (callback) => {callbacks.push(callback); return Utils.makeSubResponse()}
+        }
+    ]
+}])
+
+const callbackclient = new Frontend.RPCSocket(20000, 'localhost')
+callbackclient.connect().then(async () => {
+    const r0 = await client['HelloWorldRPCGroup'].subscribe(console.log)
+    console.log(r0)
+    await client['HelloWorldRPCGroup'].triggerCallbacks("Hello!")
+})
+```
+
 # Documentation
 [https://gitea.frontblock.me/fw-docs/rpclibrary]