Review on Universal Vehicle Smart HUD Display by Josh Cox

I bought this for an old car from the 70's and when I first tried it it worked great. And now, a little over 2 months later, I plug the device into the car after sitting on a shelf in my office and every time I have to watch the screen blink. It seems like it turns on and off multiple times per second. If I turn it off a few times, then turn it back on and let it blink for 10-15 minutes, it works until I turn off the device and then let the process start again. I really wanted to like the product because it's accurate, but the loading problem and now that after a few uses it's not picking up satellites is unacceptable. The only reason I'm not returning it is because $40 isn't worth the nightmare of the Revain return process.