Unfortunately, the first copy had problems with the Bluetooth connection and reading from USB sticks. In both cases, occurred in the middle of play to disturbances.
The device, which I had not at that time purchased from Amazon, so unfortunately declined.
Edit: The Sony RDH gtk17ip was too big for me, so I ventured a second attempt with this unit, especially as the price was very strong like. So far I have no problems with USB and Bluetooth, but all will keep you informed. As for the demo-mode and standby operation: When the unit is off, can be selected via the display function at the FB if the demo mode, the time (8 sec) or nothing to display.
Update: Unfortunately, also the second copy the already mentioned problem with the interruptions in USB Media and Bluetooth operation. A great pity, because the device is otherwise well. My advice: Stay away!