[Dual Qc3.0 Fast Charging Ports] The dual USB charger socket has two QC3.0 USB ports, which is 4x more than conventional chargers. Compatible with Quick Charge 2.0 and 1.0, suitable for all common USB devices, such as Galaxy S8 / S7 Edge / S7 / S6 Edge / S6 / 6 / G4 / P9 / G5 / 10 / 7 Etc. [Voltage Display] The car charger mounts in the digital voltage monitor, displays the real-time accurate voltage status of your vehicle's battery to avoid problems caused by low voltage, the LED light also makes it quick and easy to find USB ports in the dark or at night. [Multiple Protection] Made of heat-resistant and wear-resistant aluminum alloy. Certified by and Rohs with overcharge, overcurrent and short circuit protection to ensure charging safety, built-in reverse connection protection ensures that the circuit will not be burned out if the wiring is incorrect. IP66 Grade Waterproof. [Wide Compatibility] QC 3.0 USB Charger Socket for 12-24V cars, boats, marine, RVs, etc. Suitable for charging