it work wonderfully in place my garmin just could not get a signal even inside we garage that have no window . it be super fast too , about 3 second after its plug in it have a lock . the cord could be a little longer but that be just for my application . I drive a tow truck and this thing go to work about 60 hour a week . I have forget to put it in the truck a couple of time at the car wash and it do just fine with the soap and high pressure water . I have have to unplug it and plug it back in a couple of time but I be not sure if it be this device or window that be the problem so I wont fault the gizmo .