Features: brand new and high quality USB DC 5V to DC 12V 2.1x5.5mm Male Step-Up Converter Adapter Cable. DC-DC Converter 5V to 12V,You can use it to power the router via power bank during power cuts. And also used in other device which is 5V, such as: routers, speakers, LEDs. The step up cable support recommend 5V 2A input and 12V 800mAh output max. Convert Rate: 80%-90%.Each cable inbuilt an intelligent for protection IC circuit, please check your input or output device's current or voltage is whether over the cable's limit when you find your device is out of work. The Intelligent IC circuit provides over-current, over voltage and overload for protection, short circuit for protection, Synchronous rectification,made convert ratio more than 80%-90% , lower heat and long working for time. For other 12V Device (power Less than 6W 800mA). Specifications: Input: 5V 2A, 5.5x2.1mm Output: 12V 0.5A Cable Length: approx. 1m/3ft Color: Black Type: switch close to USB, switch close to DC (optional) Package Includes: 1 x USB DC 5V to DC 12V 2.1x5.5mm Male Step-Up Converter Adapter Cable with ON OFF Switch note: 1.No retail package. 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!