- For the supply of power to and charging of USB devices in the car, e.g. smartphone, tablet, eBook reader, MP3 player, Bluetooth speaker, etc. ,- Vehicle adapter 12/24 V for power supply in cars, lorries, and camper vans ,- Ideal for quickly charging several devices via USB at the same time ,- Allows the supply of power regardless of the notebook / computer or charging of devices ,- Operation via the cigarette lighter socket