Beyonwiz DP-S1 - Manual (Page 80)

File Playback Function
70
WARNING
z Each USB port can supply maximum of 500mA to the external device.
Connecting devices consuming more than 500mA can damage the
DP-S1 if there is no additional power supplier to the USB device.
z
The USB device should be detached properly to prevent the DP-S1
from unstable operation or damage. Please press the RED button to
detach the selected USB device properly.