This 12V/24V 4-port USB charger outlet is designed for cars, trucks, boats, RVs, motorcycles, ATVs, UTVs, and marine applications. It includes 2 QC3.0 USB-A ports and 2 USB-C PD ports, allowing up to four devices to charge at the same time. Each QC3.0 port supports up to 18W, while each USB-C PD port supports up to 30W, with a total output of up to 78W. The built-in LED voltmeter displays real-time battery voltage for easy monitoring. A dustproof flip cover helps protect the ports when not in use. Includes mounting panel, wiring harness with 10A fuse, screws, and terminals for convenient installation.