This is the replacement face plate for the ResMed AirSense 11 machine.
To remove the face plate, while pushing down the power button down on the top, pull the face plate out.
ResMed AirSense 11: Get to know your sleep therapy device
ResMed AirSense 11: Cleaning and caring for your device
ResMed AirSense 11: Maximize your comfort with humidification
ResMed AirSense 11: Introducing our new PAP machine