USB 2.0 Type-A DC 5V to DC 12V 3.5 x 1.3 mm Voltage Riser Boost Power Plug Barrel Connector Cable 100cm DC5V to 12V Voltage Riser chipset inside. Support DC5/V3A and 12V/ 1.25A power max. Provides 5V DC from USB, and 12V Power devices to 3.5 x 1.3 mm port. Router/lightcat good partner, Use the booster cable to connect 12v router/lightcat to re-internet via 5v powerbank or charger. Using QC protocol chipset, Built-in over temperature, shutdown inder-voltage over-currnet protection stable working, safe to use. For small electronics and devices which use an 3.5 mm 12V barrel jack for a power cable.