I think you will find its an adaptor that goes from your car`s cigarette lighter socket into a converter that converts the electricity into 220volts..
I strongly advise you not to switch on the HDR while you are driving...You wont be transported into another dimension, but the electromagnetism from it could affect your driving ability, or anyone driving the car!!
An unshielded source of electromagnetism in an car could cause a resonance within the car itself affecting driving ability...
The electromagnet in an HDR emits a wide frequency "noise source"...Dont have it switched on if youre driving...Stop the car then try it out if you have to...stay safe ..