Does this work if you don’t have a USB connection in your car?
I don’t quite understand your question. It’s charged by plugging it in to your car’s cigarette lighter socket. It connects via Bluetooth to your phone or MP3 player.
the device is powered by your car’s cigarette lighter or 12v socket. The USB port on the top is so you can also charge a USB device while using the bluetooth device, i.e. charge your phone while streaming via bluetooth.
I have had one of these for a few months now. I love it. My only issue is the blue LED-lit ring. It is far too bright at night, so I covered it with electrical tape. Problem solved.