Vatech EzScan-i User Manual page 13

NOTE: It is strongly recommended to plug the USB cable
to a USB port located at the back of the computer; not
doing so may result in system malfunction or reduced
performance.
Make sure to use a USB port that is compatible with USB
3.0 (SuperSpeed), usually indicated by the symbol: not
doing so may result system malfunction or reduced
performance.
5. Connect the AC/DC power adapter to a power outlet.
WARNING: Unsuitable installation sites:
Locations with excessive humidity or dust
Locations subject to high temperature
Locations subject to shaking or vibration
Locations exposed to considerable electrical or
magnetic noise, or other forms of electromagnetic
energy
IMPORTANT: If using a laptop computer, make sure the power
supply is connected to an outlet and not running on battery power.
Failure to do so will mean that the scanner will not have sufficient
power to produce images.
Page 13