Features 1. ABS + PC fireproof environmental materials， exclusive patent applications; 2. Voltage display， a highly efficient fuel save; AC charging; battery voltage warning; 3. Stable performance， portable， perfect designed， easy to carry. 4. Smart IC function， automatically identify equipment voltage， and distribute current corresponding to your equipment; there is also a fuse in the output to protect your car and phone avoid over temperature，overcurrent ， overvoltage and short-circuit. 5. suitable for any vehicle and mobile phones. 6. the output is 3.4A when a single USB port is used， while when two ports are using， smart identification will distribute the output. 7. 180° swing design， convenient to adjust the best locationSpecification:Input: DC 12V-24VOutput: DC 5V / 3.4A (1A+2.4A)Size: 51.4mm-30.3mm-117mm