[Aluminum Alloy Material] Advanced all-aluminum alloy body with scratch-resistant technology, ensuring durability and keeping the 12V USB socket looking brand new. The upgraded metal USB cigarette lighter socket does not overheat at high temperatures, making it safer than plastic. [LED Voltage Display] With a blue LED voltage display, the USB socket automatically monitors the vehicle's battery and electrical system, displaying the car voltage on the screen. The 2 USB charger socket allows you to monitor the battery health while driving. [Power Button Switch] Designed with a power button switch to control the 2 USB ports and LED voltage display, preventing battery drain from continuous illumination after the engine starts and effectively extending its lifespan. [Unique design] The independent switch is used to control the cigarette lighter, not the USB interface,Approximately 224g in size, measuring 11 * 9 * 8.5cm [Comprehensive Protection] The 12V USB car socket is UL and CE certified with overload, overcurrent and short circuit protection to ensure charging safety. In addition, we also equipped with 10A fuse in case of emergency.