About this item 1. USB A male Input: 5v 2A; DC connector Output: 12v 0.7A max. (Note: Do not use the device for more than 12 watts. If you are using a large power supply this will not work.) DC jack: 5.5 x 2.1 mm. 2. Built-in identification resistor, reverse polarity protection, over current protection, over temperature protection, short circuit protection. A smart design that ensures lower heat generation and a long working time, protecting your device from damage. 3. This USB step-up cable features a PCB board molded by durable PVC to withstand damage. 4. Compatible with cameras, routers, stepper motors, desk lamps, speakers, Bluetooth headsets, mini fans, LED lights, and other 5v devices. 5. Compact size and easy to carry. Dimensions: 6.8 x 4 x 0.5 inches.