Review on [Updated Version]QUICK CHARGE 3.0 Cigarette Lighter Adapter: Powerful 120W 12V/24V 3-Socket Power Splitter with 8.5A 4 USB Ports. Multifunction Car Charger with LED Display Voltage and Upgraded On-Off Switch - Latest Upgrades! by Charles Parente

I bought two of these. One for my truck and one for my car. I installed both and they work. If I had one complaint it would be that the max wattage of a female cigarette lighter adapter is 60W. While all three can be used simultaneously and can deliver up to 120W together, each individual socket can only handle 60W. I'd rather have each adapter output independently handle the full 120 watts. Two standard USB ports (2.4A) do about the same thing. If you charge a single device using a 2.4A USB port, it will receive 5V at 2.4A. However, if you use both 2.4A ports, the devices will share 3.1A. The connections are marked. The third USB port is a 3.1A port. The QC3.0 port will automatically search and select the required voltage. 3.6-6.5V/3A, 6.5-9V/2A and 9-12V/1.5A with 18W max output, all adjustable via adapter. be pulled out of this unit, otherwise the fuse will blow. For these reasons I gave 4 stars. It comes with two adhesive pads attached to the device for installation. However, these things never last long in my experience, so I also used screws to hold the device in place.