For those interested in buying a 12Volt 1Amp power supply compatible with IDVisor Z22 Mobile or IDVisor Z22 MSR or IDVisor Touch , here is a link to a product on Amazon.
The power supply must be 12V DC – Center Positive with 1000 mA (1A) or more output. The Connector is a 5.5 mm barrel jack.
iMBAPrice® 12V DC Wall Power Adapter – 5.5mm x 2.1mm plug 1A(1000MA) UL Listed Power Supply
Definition of Center Positive: The center of the plug is plus and the outer ring is negative.