ROCK H2 Dual USB Car Charger with Digital LED Display 5V/3.4A Aluminium Alloy Voltage Monitoring for iPhone SamsungFeature:Compact size--Portable size, perfect for travel use.Aluminum Alloy Housing--Precisely crafted with aluminum alloy , it presents excellent high and low temperature resistance.Voltage Monitor--Built-in intelligent voltage monitor with LED digital display real time show the voltage of the voltage status of car.Safety Protection--It shows voltage and current alternately to provide overcurrent and short circuit protection.3.4A Charge--It delivery port output up to 3.4A. Larger wattage keeps your device at high speed, taking less time to fully charge.Dual USB Ports--Equipped with Dual USB ports with single output up to 3.4A, it quickly recharges most smartphones, tablets , GPS and other USB devices.Intelligent Chip--Intelligent circuit design protects against Over-current, over-, short circuit and for good performance.Wide Compatibility--12V to 24V voltage is compatible with most vehicles on the market. Specifications:Type: Car ChargerBrand: RockModel: H2Material: Aluminium AlloyColor: Black, Silver (Optional)USB Port: Dual USB Input: DC 12V-24VOutput: DC 5V/3.4AProduct Size: Approx.3.03 * 6.03cm / 1.2 * 2.4in (D * H)Product Weight: 24.1g / 0.85ozPackage size: Approx.8 * 5.5 * 3cm / 3.1 * 2.1 * 1.1inPackage weight: Approx.52g / 1.8ozNOTE:The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. If there is inconsistency between the image and the actual product, the actual product shall govern.Package List:1 * Car Charger a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a