Adjustable Power Supply-Input: AC 100~240V, 50/60Hz;Output: DC 3~12V Adjustable(such as 3V 3.5V 4V 4.5V 5V 5.5V 6V 6.5V 7V 7.5V 8V 9V 10V 11V 12V),Power Max 144W;Compatible with devices with current below 12Asuch as 200mA,300mA, 500mA,1A,1.5A,2A,2.5A,3A,4A,5A,6A,7A,8A,9A,10A,11A,12A). And the polarity of this adapter is:inside(+),outside(-). Multiple DC Tips & Reverse Polarity Converter-It comes with an original 5.5x2.1mm tip,equipped with 12 frequently used plugs: DC terminal connector, 6.4x4.0mm+Pin, 5.5x2.5mm, 5.0x3.0mm+Pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm.And a reverse polarity conversion cable, which can convert the output of the power adapter into a positive electrode (+). Visual Voltage-Built-in protruding rotatable button for adjusting the voltage suitable for your device. Increase the off gear to turn off the power without pulling the plug. The LED displays real-time voltage,voltage data visually. When in use