Won't stay connected - Bullseye AmmoCam Long Range Edition Target Camera

I bought this product with high expectations despite some of the bad reviews. Well my unit won't stay connected when I tried it out at 10 and 50 meters. The unit will stay connected initially when I start it up and then about 5 minutes later it will lose connection. I tried moving the camera around, but that didn't work. I tried it 10 meters and the same thing would happen. I called them up and they couldn't give me an answer to solve the problem so I sent it back with shipping cost of $42. I got the unit back and tried it at 10 meters before I was willing to walk down the dusty range for longer distances. Well, the results were the same after about five minutes it would lose signal between the base station and the camera. I called them again and they want me to go and move the units around to see if it can pickup a signal. I am afraid I am going to be stuck with a very expensive, but cheaply built electronics. Don't buy this system. Their competitor systems have at least better reviews.