Hisense 32S4 Quick Setup Manual page 16

Making Connections
USB
DC 5V 0.5A(MAX)
USB
NOTES
When connecting a hard disk or a USB hub, always connect
the mains adapter of the connected device to the power
supply. Exceeding a total current consumption may result in
damage. The USB1.1 and USB2.0 devices maximum current
consumption are 500mA.
For individual non-standard high-capacity mobile hard disk, if
its impulse current is greater than or equal 1A, it may cause
TV-rebooting or self-locking. So the TV does not support it.
The USB port supports a voltage of 5V.
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