[DUAL QC3.0 USB PORTS]Designed with Smart IC and fast charging technology, Cigarette Lighter Socket comes with two 18W / 3A QC3.0 USB port, up to 4x faster than traditional chargers. Universal for all 12V-24V cars, bus, RV, ATV, Truck, trailer, boats. marine and more.[Voltage Display & Safety Driving]digital voltmeter display that shows 6-24V voltage. The real time LED voltmeter can remind you whether the voltage is at a normal level to ensure safety driving. Total output up to 120W(12V) / 250W(24V), meet all your charging demand[Independent Toggle Switch]This charger panel designed with independent ON/OFF switch, which saves more electricity and expands the product??s lifespan. You also no need to worry about drain any power.[High Quality Material] Made of ABS and Aluminum material, this car charger has the features of better heat emission, wear resistant and non-flammable. 10A built-in fuse provides intelligent protection, such as over-load, over-heat, over-voltage, under-voltage and