12V USB Outlet, 56W 12V USB Socket Car Charger with Dual QC 3.0 and PD 3.0 Three Car USB Port, Waterproof Car USB Charger Multi Port with Power Switch LED Voltmeter for Car Boat Marine Truck RV, etc.

Dual QC 3.0 + 1 PD USB Port: Dual USB Quick Charge 3.0 ports and one PD3.0 USB C connector can charge up to three devices on the same time on the fastest imaginable speed, and the multi-port design can meet your needs.
Blue Soft Light Voltage Display: Equipped with a soft light digital voltage display, it will possibly correctly display the voltage status of your car battery in real time, preventing problems caused by low voltage and ensuring driving safety.
Energy Saving Switch: Push-button switch controls the LED voltmeter and all charging USB ports, ensuring that the charger won’t continue to consume your car battery when it’s idle, saving energy.
Excellent Quality: The charger socket case is top quality ABS plastic, it’s going to not get hot. The built-in smart chip enables every port to intelligently identify your device and maximize charging speed. And the built-in protection prevents overcurrent, overheating and overcharging.
Wide Compatibility: This USB C socket is suitable for all 12V-24V cars, marine, motorcycles, golf carts, ATVs, RVs and more. Supports all cell phones, tablets, video game controllers, mobile power, and other USB-A and USB-C charged electronic devices.
Easy installation: You’ll replace your car’s original cigarette lighter socket with this USB charger. Or, You’ll DIY the installation by drilling a 1.18 inch/3cm hole, inserting the charger and tightening the ring, then connecting the positive and negative wires（Red 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’s going to not be energized.