diff --git a/public/main.js b/public/main.js
index 3b15b32..f2986a4 100644
--- a/public/main.js
+++ b/public/main.js
@@ -51,8 +51,8 @@ peer.on('connection', (conn) => {
 // Handle incoming voice/video connection
 peer.on('call', (call) => {
   console.log('INCOMING CALL', call);
-  call.answer(stream); // Answer the call with an A/V stream.
-  renderVideo(stream, '#localVideo');
+  call.answer(window.stream); // Answer the call with an A/V stream.
+  renderVideo(window.stream, '#localVideo');
   call.on('stream', renderVideo);
   // navigator.mediaDevices.getUserMedia({video: true, audio: true})
   //   .then((stream) => {
@@ -78,7 +78,7 @@ let connectToPeer = () => {
     conn.send('hi!');
   });
   
-  let call = peer.call(peerId, stream);
+  let call = peer.call(peerId, window.stream);
   call.on('stream', renderVideo);
   // navigator.mediaDevices.getUserMedia({video: true, audio: true})
   //   .then((stream) => {
@@ -90,24 +90,136 @@ let connectToPeer = () => {
   //   });
 };
 
-let stream;
 let startLocalStream = () => {
   navigator.mediaDevices.getUserMedia({video: true, audio: true})
     .then((localStream) => {
       console.log('LOCAL STREAM', localStream);
       renderVideo(localStream, '#localVideo');
-      stream = localStream;
+      window.stream = localStream;
     })
     .catch((err) => {
       console.log('Failed to get local stream', err);
       logMessage('Failed to get local stream', err);
     });
 }
-startLocalStream();
+// startLocalStream();
 
 let disconnectFromPeer = () => {
   
 }
 
 window.disconnectFromPeer = disconnectFromPeer;
-window.connectToPeer = connectToPeer;
\ No newline at end of file
+window.connectToPeer = connectToPeer;
+
+
+  
+/*
+*  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+*
+*  Use of this source code is governed by a BSD-style license
+*  that can be found in the LICENSE file in the root of the source
+*  tree.
+*/
+
+// 'use strict';
+
+const videoElement = document.querySelector('#localVideo');
+const audioInputSelect = document.querySelector('select#audioSource');
+const audioOutputSelect = document.querySelector('select#audioOutput');
+const videoSelect = document.querySelector('select#videoSource');
+const selectors = [audioInputSelect, audioOutputSelect, videoSelect];
+
+audioOutputSelect.disabled = !('sinkId' in HTMLMediaElement.prototype);
+
+function gotDevices(deviceInfos) {
+  // Handles being called several times to update labels. Preserve values.
+  const values = selectors.map(select => select.value);
+  selectors.forEach(select => {
+    while (select.firstChild) {
+      select.removeChild(select.firstChild);
+    }
+  });
+  for (let i = 0; i !== deviceInfos.length; ++i) {
+    const deviceInfo = deviceInfos[i];
+    const option = document.createElement('option');
+    option.value = deviceInfo.deviceId;
+    if (deviceInfo.kind === 'audioinput') {
+      option.text = deviceInfo.label || `microphone ${audioInputSelect.length + 1}`;
+      audioInputSelect.appendChild(option);
+    } else if (deviceInfo.kind === 'audiooutput') {
+      option.text = deviceInfo.label || `speaker ${audioOutputSelect.length + 1}`;
+      audioOutputSelect.appendChild(option);
+    } else if (deviceInfo.kind === 'videoinput') {
+      option.text = deviceInfo.label || `camera ${videoSelect.length + 1}`;
+      videoSelect.appendChild(option);
+    } else {
+      console.log('Some other kind of source/device: ', deviceInfo);
+    }
+  }
+  selectors.forEach((select, selectorIndex) => {
+    if (Array.prototype.slice.call(select.childNodes).some(n => n.value === values[selectorIndex])) {
+      select.value = values[selectorIndex];
+    }
+  });
+}
+
+navigator.mediaDevices.enumerateDevices().then(gotDevices).catch(handleError);
+
+// Attach audio output device to video element using device/sink ID.
+function attachSinkId(element, sinkId) {
+  if (typeof element.sinkId !== 'undefined') {
+    element.setSinkId(sinkId)
+        .then(() => {
+          console.log(`Success, audio output device attached: ${sinkId}`);
+        })
+        .catch(error => {
+          let errorMessage = error;
+          if (error.name === 'SecurityError') {
+            errorMessage = `You need to use HTTPS for selecting audio output device: ${error}`;
+          }
+          console.error(errorMessage);
+          // Jump back to first output device in the list as it's the default.
+          audioOutputSelect.selectedIndex = 0;
+        });
+  } else {
+    console.warn('Browser does not support output device selection.');
+  }
+}
+
+function changeAudioDestination() {
+  const audioDestination = audioOutputSelect.value;
+  attachSinkId(videoElement, audioDestination);
+}
+
+function gotStream(stream) {
+  window.stream = stream; // make stream available to console
+  videoElement.srcObject = stream;
+  // Refresh button list in case labels have become available
+  return navigator.mediaDevices.enumerateDevices();
+}
+
+function handleError(error) {
+  console.log('navigator.MediaDevices.getUserMedia error: ', error.message, error.name);
+}
+
+function start() {
+  if (window.stream) {
+    window.stream.getTracks().forEach(track => {
+      track.stop();
+    });
+  }
+  const audioSource = audioInputSelect.value;
+  const videoSource = videoSelect.value;
+  const constraints = {
+    audio: {deviceId: audioSource ? {exact: audioSource} : undefined},
+    video: {deviceId: videoSource ? {exact: videoSource} : undefined}
+  };
+  navigator.mediaDevices.getUserMedia(constraints).then(gotStream).then(gotDevices).catch(handleError);
+}
+
+audioInputSelect.onchange = start;
+audioOutputSelect.onchange = changeAudioDestination;
+
+videoSelect.onchange = start;
+
+start();
\ No newline at end of file
diff --git a/views/index.html b/views/index.html
index cd3413e..6c669d3 100644
--- a/views/index.html
+++ b/views/index.html
@@ -36,7 +36,22 @@
     <button onclick="disconnectFromPeer()">
       Disconnect
     </button>
-    
+    <hr>    
+    <p>Get available audio, video sources and audio output devices from <code>mediaDevices.enumerateDevices()</code>
+        then set the source for <code>getUserMedia()</code> using a <code>deviceId</code> constraint.</p>
+
+    <div class="select">
+        <label for="audioSource">Audio input source: </label><select id="audioSource"></select>
+    </div>
+
+    <div class="select">
+        <label for="audioOutput">Audio output destination: </label><select id="audioOutput"></select>
+    </div>
+
+    <div class="select">
+        <label for="videoSource">Video source: </label><select id="videoSource"></select>
+    </div>
+    <hr>
     <div class="messages">
       
     </div>