I put in the central vent of my BMW 320i. Jai sentenced ventilation AR a 6 mm hole in the bottom to route the cables and insulation of the assembly by a SDB type seal. It fits perfectly in space (it must be on removing the pallets in vertical and horizontal plastic. Connected to my 2 Din Car Android, I surf the net faster than on my old phone. I expect the delivery of a 3.5 "display which will close the ventilation and allow me to even music videos (and others) for my wife while putting GPS to me. So Nickel with these USB outputs (Dongle Internet, mini wireless keyboard, Extension USB for my 64GB USB key I did resortir in the glove box !!!
