Description: Application: 1.When QC3.0 USB input,5.5x2.1mm output is 5V-12V,your USB adapter must have for QC 3.0 12V output,if standard USB 5V input,output is 5V,can not adjustable voltage. 2. With this cable, you can connect your power bank to router. Thus, when power cut, you can use your qc3.0 USB power bank to supply your router. 3. When for QC 3.0 USB input,the output voltage can be adjusted from for DC 5V-12V,Use this cable, you can supply your car air purifier LED strip light by qc3.0 usb power bank 4.For 12V WiFi Router,Light for Cat, switches and other other 12V Device (power Less than 18W ) 5.Press the button voltage to change 0.2V each for time, adjust to the maximum voltage and then press the button voltage to reduce 0.2V each for time. When the voltage is set to 12V, the next for time you use the default 12V, only supports QC3.0 wall or car USB charger or QC3.0 USB power bank Specifications: Input Voltage: 12V QC3.0 USB charger Output Voltage: DC5V- 12V(can adjustable voltage) Output Current: 1.5A max Max Output Power: 18W max Cable Length: Approx. 100cm Color: Black Input interface: standard USB 2.0 male Output Interface: 5.5x2.1mm Plug (Inside the positive,outside the negative) Quantity: 1PC (other accessories in the picture is not included) Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 X QC3.0 USB to 12V 5.5x2.1mm adjustable voltage Cable