I've been using the 3.813 V1 lately on my highway trips back and forth from Houston to Austin and I'm very impressed with the range I'm getting with the V1.
There was one encounter however where I felt the arrows weren't too accurate. I was driving on the highway in the open road with little traffic and my V1 alerted to Ka band and started off with displaying a front arrow. Then after a couple of seconds it displayed the rear arrow also with no additional signal alert in the bogey counter. So after another couple of seconds with full Ka blast and front arrow and rear arrow both on with a bogey counter of 1, I see a cop passing by the opposite way of what I'm traveling who seems to left his Ka radar on. I don't recall if one of the arrows was flashing to signal priority but I remember both of them being lit at some point.
I know V1 can pick up reflections of one radar source since it has two antennas, but doesn't it usually alert to another bogey and display another arrow? Did the V1 pick up some sort of reflection on the highway? Is it normal for the arrows to be off like in my situation? I was kind of thrown off by the arrows in this situation.