[Aluminum Alloy Material] The advanced full aluminum alloy body with scratch resistance technology keeps it sturdy and lets the 12v USB outlet always look like new. Upgrade metal car chargers will not overheat at high temperatures, which is safer than plastic ones.[Dual QC3.0 USB Ports] With dual supporting QC 3.0 USB ports, the 36W 12-volt USB outlet charges two compatible devices up to 4X faster than conventional charging, backward-compatible with QC 2.0 &1.0. It delivers the fastest possible charge to all non-Quick charge devices.[LED Voltmeter Display] Features a blue LED voltmeter that automatically monitors the vehicle’s battery and the electrical system and indicates the car voltage on the screen. dual USB charger socket will let you know the battery’s health while driving.[Wide Compatibility] Fits for DC 12/24V car, boat, marine, motorcycle, ATV, RV, etc. This USB Socket is suitable for charging iPhones, Samsung, iPad, android tablets, power banks, video game controllers, sport