12V USB Car Socket Round USB C 12V Outlet, 3-Port Marine USB Fast Charger Waterproof Cigarette Outlet USB Replacement Aluminum with Switch & Voltmeter, Suitable for Boat Golf Cart RV Motorcycle Truck

[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.
[Three USB Ports] Equipped with dual PD 3.0 30W USB-C ports and a QC 3.0 18W USB port, the 78W 12V car USB port charges three compatible devices simultaneously, consistent with PD 2.0 /QC 2.0 / 1.0. It provides the fastest charging for all non-fast charge devices.
[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 three USB charger socket allows you to monitor the battery health while driving.
[Power Button Switch] Designed with a power button switch to control the three USB ports and LED voltage display, preventing battery drain from continuous illumination after the engine starts and effectively extending its lifespan.
[Wide Compatibility] Suitable for DC 12/24V cars, boats, ships, motorcycles, ATVs, RVs, golf carts, SUVs, etc. This car USB charger is compatible with electronic devices such as iPhones, iPads, Samsung, Android cell phones and tablets, smartwatches, etc.
Easy installation: You can replace your car' s original cigarette lighter socket with this USB charger. Or, you can DIY the installation by drilling a 1.18 inch/3cm hole, inserting the charger and tightening the ring, then connecting the positive and negative wiresRed wire to Silver plug(+), Black wire to Golden plug(-). See the pictures for detailed installation instructions.
Please note: The bottom of the product is marked with " +" and " -", the red line connects to +, the black line connects to -; if the connection is reversed, it will not be energized.