Universal Adjustable Power Adapter: The input voltage of the DC power supply: AC 100-240V, 50-60Hz, and the maximum power is 144W 6A. You can easily get the voltage you want by turning the knob, such as 4V 4.5V 5V 6V 7.5V 9V 12V 12V 15V 18V 19V 20V 24V.Compatible with devices with current below 6Asuch as 200mA,300mA, 500mA,1A,1.5A,2A,2.5A,3A,4A,5A,6A). The polarity of this adapter is: inside(+), outside(-). Multiple DC Tips & Reverse Polarity Converter: Our 24v DC power supply comes with an original 5.5x2.1mm tip, equipped with 14 frequently used plugs: Micro USB, Type-C, DC Connector Plug, 6.5x4.4mm+pin, 5.5x2.1mm, 5.5x3.0mm+pin, 5.0 x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm. The package comes with a reverse polarity conversion cord. Polarity: Positive (+) inside, Negative (-) outside. Visual Voltage-Built-in protruding rotatable button for adjusting the voltage suitable for your device. Increase the off gear to turn off the powe