Multiple protection: 12v usb socket can protect your device from over-voltage, over-heating, over-load, or short-circuit. Surface Mounting: It can be mounted on a plane, just a small hole to plug the wire, with the black line attached to the negative and the red line to the positive. The blue light is always on when powered on and is easy to find in the dark. Waterproof & Dustproof: Nylon housing have effective scratch resistant. It also design has auto rebound cap, this cap effectively protects the charger against sudden water splashes and dustproof. Quick Charge 3.0 Port: The output is 18w. 12v usb charger and provide 4x quick charging to compatible devices. 12 volt power outlet can able to charge compatible devices up to 80% in just 35 minutes. Pd 3.0 Port: The output is 18w. The rv usb outlet provides 3x quick charging for compatible devices. 12 volt usb outlet can able to charge compatible devices up to 50% in just 30 minutes.