1.switching power supply 2..ac input range selected by switch 3.high ... use copper clad aluminum transformer)modelDimensionsSwitching power supply30-48W--12V/3A,24V/2A,5V/6AHT40W90×70×38mmSwitching power supply60W--12V/5A,18V/3A ... 50mmSwitching power supply350W-non tender 7.5V47A,28V/13A 30V/12AHT350W215×115×50mmSwitching power supply350W--36V/10A,48V/7AHT350W215×115×50mm UL certificated power supply