There has to be a down side to it. It can't be that easy. Really?I tried several different RF transmitters to get a targeting system going over the last 5 years with varying problems, mostly range on the transmitter through the wooded lane going back to my 500 yard target. Now I find all I have to do is mount my android cell phone on a tripod, point the camera at the target, turn on video chat and call my wife's phone. I then watch my bullets hit the target from the bench on my wife's phone. Works at any distance!