Features: USB Step-up converter cable is a multifunctional and efficient solution for powering low-power devices. Input voltages: USB DC5V, output voltages: DC5.5x2.1mm 12V/9V, output current:9V/1Amp, 12V/1Amp. Display output voltages, white digit, output voltages can be changed, 9V output or 12V output. The internal positive electrode and external negative electrode of the interface, USB to DC12V/9V cable can be used to power the router via power bank if power down. Also suitable for use in various 9V 12V low-power devices such as routers, optical cats, speaker, cameras, etc. Specifications: Material: Plastic Color: Black Cable Length: Approx. 1m/3.28ft USB Input: 5V3A 5.5x2.1mm Output: 9V1Amp, 12V1Amp Package Includes: 1x USB to DC5521 Power Cord note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.