Power demands for USB are ever-increasing as we get more and more battery life in our smart devices. This cigarette lighter adaptor provides 4 USB charging ports, for up to 7.2A combined charging power - that's a lot! Tablets, smartphones, and other high demand devices can then charge at their desired rate, up to 2.4A per port. Works on 12 or 24V systems, so suitable for trucks and boats too. 12-24VDC Input 2.4A Max Per Port Input Voltage: 12-24VDC Current Output: 2.4A (Each Port Max), 1.8A (Across all Ports), 7.2A (Total) Protection: Overload Short Circuit DC current rating : 7.2A Length : 84.5mm Width : 48.0mm Height : 28.0mm Vehicle Connection : Cigarette Lighter plug Output Type : USB Type A Output Connection : Socket Number of Outputs : 4.0pc Type of converter or transformer : DC to DC