Features: This dual QC3.0 USB ports car charger can simultaneously charge two devices that support the QC3.0 protocol at QC3.0 speed. Please note that some mobile devices do not support charging at QC3.0 speed: This USB car charger fast charge at maximum charging speed your device supports. Our car phone charger with LED voltmeter and for touch switch design. Built-in intelligent control chip and 10A fuse: provide overcurrent for protection, overvoltage for protection, overtemperature for protection, overcharge for protection, short circuit for protection, reverse wiring for protection. Ensure the safety of your charging device and vehicle battery. Quickly identify charging devices in one second. This car charger adapter provides the fastest possible charging for all non-fast charging devices. Specifications: Material:Aluminum Alloy for Shell Color:Black,Red,Blue Light Color:Blue,Green,Red Input voltage: 12-24v Output voltage: 5V Size:Approx.5.15x3.7x3.7cm/2.03x1.46x1.46in Package Includes: 1x QC3.0 Car Charger note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.