The traditional charger is QC2.0, we have achieved dual 3.0 USB ports through improvement, and it also has a QC3.0 PD port in the middle, which realizes fast charging and adds a PD port.Our material is ABS, which is more durable and stronger than normal plastic. It has output short circuit protection, overload protection, polarity protection, overcharging, multiple protections.And it has a waterproof cap, has a good waterproof type.This switch isn't just for RVs, ATVs, and ships. It is also suitable for rocker switches. Usually we will see the USB charger on the panel switch, the size of this charger can be installed on the rocker switch.The usb changer are widely applicable for marine boat, car,launch pleasure-boat, RV, car,vehicles, truck, yacht,off-road,caravans,etc.