The 5V 3.1A Dual-Port Universal Speed Charging Car USB Charger Adapter has two USB outputs， allowing you to charge two devices at the same time. It features a sleek compact design that is easy to carry. 2.1A large current enables speed charging for your portable devices such as cellphones， tablets， and more. And it is inbuilt with smart charging that automatically detects USB devices to determine the proper charging current. 7 safety protections avoid the damage that may be caused by overload and overheating to ensure a stable performance. Rest assured to rely on it!                                    Features             Sleek， compact design， easy to carry<br> Two USB outputs let you charge two devices at one time<br> 2.1A large current enables speed charging for your portable devices<br> Inbuilt smart charging module automatically detects USB devices to determine the proper charging current<br> 7 safety protections avoid the damage that may be caused by overload and overheating<br> Stable performance， high reliability   <br>                                                            Specifications             Material     ABS & Metal    <br> Color     White & Blue     <br> Input     12-24V    <br> Output     5V    <br> Maximum Current     3.1 A    <br> USB Port     Double Port    <br> Working Temperature     -10°C-50°C    <br> Dimensions     (2.80 x 1.06)" / (7.1 x 2.7)cm (L x Dia)    <br> Weight     0.91oz / 25.9g     <br>                                                             Package Includes            1 x Car Charger Adapter<br>