In my work vehicle, I have a full size power inverter that is hardwired into the car. I recently had to switch over to a rental car temporarily so I needed a power inverter that could handle my daily charging needs on the go. This Bestek power inverter did the job without any issues. Simply plug it in to the DC outlet, flip the power switch and plug in your power cords. With the 2 outlets, I was able to charge 2 laptops at the same time just as if I was plugged into a wall outlet. The inverter has a fan built in, but I barely even heard it. Would definitely recommend to anyone who needs the flexibility to use a power cord in their car.