superb product (my 3 em for 3 cars). I decided to buy the sequel to the fact that 1 had overheated (because 1 + 1 empty gps smart phone empty) and walked again afterwards: therefore robust. Offer with charger and usb cable. A lament, despite a request by email, they charge 2 shipments for 2 products for this 4 stars! That was because of the supply cable car charger + black it is much more expensive. See with use.