[Aluminum Alloy Material] The advanced full aluminum alloy body with scratch resistance technology keeps it sturdy and let the 12v USB outlet always look like new. Upgrade metal car charger will not be overheating at high temperatures, which is safer than plastic one. [Dual QC3.0 USB Ports] With dual supporting QC 3.0 USB ports, the 36W 12 volt USB outlet charges two compatible devices simultaneously up to 4X faster than conventional charging, backward-compatible with QC 2.0 &1.0, and deliver the fastest possible charge to all non-Quick charge devices. [LED Voltmeter Display] Features blue LED voltmeter which monitories the vehicle's battery and electrical system automatically and indicating the car voltage in the screen, YonHan dual USB charger socket will let you know the health of battery while driving. [Wide Compatibility] Fits for DC 12/24V car, boat, marine, motorcycle, ATV, RV etc. This USB Socket is suitable for charging iPhone, Samsung, iPad, android tablets, power banks, video games controllers, sports watch etc. [ALL-ROUND PROTECTION] Certified by CE & ROHS with Over-load, Over-current and Short Circuit Protection to ensure charging safety, guard the safety of your devices.