That line of sight thing can be a problem. A few weeks ago I set my call maybe 30y in front of me, down a little hill. It was out of sight. I had to hold the remote over my head to control it. It's happened many times. It's rarely an issue, but you get the same thing from foxpro and lucky duck calls, but strangely, the icotec (whatever model is have), doesn't. It doesn't need line of sight. It works much further away as well.