Nilight Rocker Switch Style Dual USB Charger Input: 12V-24V DC Output:5V 4.2A DC Made of ABS material, resistant to high temperature, low temperature, and flame retardant. Compatible: This USB fast charger is very suitable for boats, yachts, speedboats, RVs, golf carts, ATVs, and most carts.It can quickly charge mobile phones, PDAs, tablets, cameras, GPS and other devices. Easy to install: This 12V USB Charger is very easy to install: "+" is connected to the positive power supply, and "-" is wired to the negative power. Waterproof and Dustproof: The rubber cover is suitable for marine wet or dust environment which protect the internal circuit, and effectively extend its service life. Package Include: A Rocker Switch style Dual USB Charger 2 Blue Insulated terminals.