in 1 MULTIFUNCTION PANEL: This four-hole panel includes dual USB charger socket (Output: DC 5V/4.2A) + LED voltmeter (Display range: 0-24V) + 12V power outlet (Output: DC 12V) + ON-OFF Toggle Switch. They’re interchangeable, and also can be replaced with any port with additional USB outlets, or anything else that fitsSMART DUAL USB CHARGER: By intelligently identifying any connected device, the Smart USB port delivers the optimum, high-speed charge to all devices, like Apple and Android phones, tablets, cameras, etc. With a waterproof cover, it effectively resists water and dust when not in usePREMIUM QUALITY & PROTECTION: Made of eco-friendly nylon flame retardant durable material, wear and tear-resistant for long-lasting durability. Over-heated, over-current, over-charging protectionCOMPATIBILITY: Widely used for cars, trucks, motorcycles, RVs, ATVs, boats, Camper Vehicles, etc. Easy to install and convenient to use. LED digital display looks cool and allows quick and easy usage in