Sleep Mode is a state that allows Dolby Dimension to be ready to go instantly once picked up from the Charging Base.  Dolby Dimension goes into Sleep Mode when placed on the Power Base or when the power button is pressed while active.  When in Sleep Mode, Dolby Dimension will wake up when you do one of the following: remove it from its Power Base, press the Power Button, or press any of the Source Buttons to automatically connect to its previously paired device.