Updating your Denon PerL Pro
In order to access the latest features for your Denon PerL Pro make sure you update:
Your Denon Headphones app
To update the Denon Headphones app, open the App Store (for iOS devices) or Google Play (for Android devices) to check for available updates.
Your Denon PerL Pro
Some improvements may be added to the Denon PerL Pro with a firmware upgrade. These will be either automatically applied to your device or you may need to perform the below.
Open the Denon Headphones app.
A message will appear that an update is available, tap “Begin Update”, or, tap menu icon ( 
) > “Device Settings” > “Software update” > “Begin Update”
) > “Device Settings” > “Software update” > “Begin Update”Your upgrade will begin.