Features:Convenient Dual USB Charging Port:Coming with two USB charging interfaces supporting total 3.1A output(single USB max. output is up to 3.1A)our USB car charger can charge two electronic devices simultaneously to ease your time.Intelligent and Compatible Fast Charge:Equipped with smart chipour USB car charger can identify different charging current needs of devices and optimize charging current to speed up charging time. Besidesit supports most electronic devices such as smartphonestabletscamerasMP4 players and GPS devices and can be installed on various DC 12-24v vehicles.Worry-Free Security Charge:Built-in intelligently-designed circuitour USB car charger can provide short circuitingover-heatingover-currentsover-charging and other advanced protections to ensure the safety of your devices.Real-Time Car Battery Voltage Monitor:Coming with a LED digital screen which displays the car battery voltage in real time to keep your car battery safe and driving safe.Reliable Exterior Design:Adopting premium aluminum alloyzinc alloy and PC materialsour USB car charger is anti-oxidationflame-retardantabrasion resistant and durable.Specifications: Product Type: USB Car Charger Material: Aluminum Alloy + PC + Zinc Alloy Input Voltage: DC 12-24V USB Output: DC 5V/15.5W/3.1A Working Temperature: 0Celsius-40Celsius/32-104Fahrenheit Item Size: 3.3cm x 3.3cm x 6cm/1.3in x 1.3in x 2.4in (L x W x H) Item Weight: 25g/0.06lbs Packaging Size: 8.5cm x 4.8cm x 12.9cm/3.3in x 1.9in x 5.1in (L x W x H) Packaging Weight: 102g/0.23lbsPackage Lists:1 x Dual USB Car Charger<