diff --git a/source/components/device_tracker.asuswrt.markdown b/source/components/device_tracker.asuswrt.markdown
index 362a30a3a3e..028a94daea2 100644
--- a/source/components/device_tracker.asuswrt.markdown
+++ b/source/components/device_tracker.asuswrt.markdown
@@ -12,6 +12,10 @@ footer: true
 <img src='/images/supported_brands/asus.png' class='brand pull-right' />
 This platform offers presence detection by looking at connected devices to a [ASUSWRT](http://event.asus.com/2013/nw/ASUSWRT/) based router.
 
+<p class='note warning'>
+This device tracker needs telnet to be enabled on the router.
+</p>
+
 To use an ASUSWRT router in your installation, add the following to your `configuration.yaml` file:
 
 ```yaml
@@ -23,6 +27,10 @@ device_tracker:
   password: YOUR_ADMIN_PASSWORD
 ```
 
-This device tracker needs telnet to be enabled on the router.
+Configuration variables:
+
+- **host** (*Required*): The IP address of your router, e.g. 192.168.1.1.
+- **username** (*Required*: The username of an user with administrative privileges, usually *admin*.
+- **password** (*Required*): The password for your given admin account.
 
 See the [device tracker component page](/components/device_tracker.html) for instructions how to configure the people to be tracked.