1、VARIABLE POWER SUPPLY: Input is 50/60Hz, output is DC 5‑24V adjustable, maximum 2.5A 600W.You can easily get the voltage you want by turning the button, such as 4V 4.5V 5V 5V 6V 7.5V 9V and so on. 2、MULTIPLE DC TIPS: Equipped with 10 common plugs, Micro USB, Type C, DC terminal connector, 2.5x0.7mm, 4.0x1.35mm, 4.5x3.0mm, 3.5x1.35mm, 3.0x1.1mm, 4.0x1.7mm, 6.5x4. 4mm.Don't exceed the voltage of 5A, otherwise the power supply will be damaged. 3、UNIVERSAL AC ADAPTER: Universal AC adapter with reverse polarity converter, our DC plug polarity, inner positive (+), outer negative (‑). You can use this reverse polarity converter to extend the application range of the adapter even more. 4、ROTATABLE BUTTON: Built in rotatable button to adjust the voltage suitable for your device, LED display real time voltage to help you control the real time charging situation. The knob adjusts more evenly, rotate 50% to reaching 13V‑14V.No protruding knob switch to prevent accidental touching, attached knob. 5、WIDELY USED: Multiple safety protection system, automatic over voltage cut off, over current cut off, over temperature cut off, short circuit cut off. Suitable for many 5‑24V small household electronic products, such as LED strips, under cabinet lights, TV boxes, smart speakers, wireless routers, essential oil diffusion humidifiers, USB fans, etc. For indoor use only. Item Type: 60W Universal Power Supply Adjustable Material: ABS, PC Output Power: 60W (Maximum) 1 x Power Supply Adjustable 1 x Adapter 1 x Reversed Polarity Line 1 Set x Adapter (10PCS) 1 x Knob