Generally put it where you want to draw the fox to, in order to get a safe shot. It will easily work remotely up to 150 yards. I usually site it with a safe backstop at zero range for my rifle if the ground is suitable. If I have to site it a shorter or longer distances I tend to pace out the distance and make a mental note of any hold over or hold under required. I tend to just put it on the ground and camouflage it with some grass or reeds. My 350 has a red light that comes on when the remote is activated so I cover this with grass or leaves or some adhesive tape if I have any. I try to walk it out in a direction opposite from where I think the fox might come from so I don't leave any ground scent on ground the fox might cross on the way into the caller. Obviously you want to be downwind of both the caller and the most obvious line the fox will take. This won't stop foxes common in behind you on occasions! I've also added the rotating lure that you can attach via the AUX socket and operate from the remote, these are good at dusk as the light is going but not that useful after dark, mind you I have had it buzzed a few times by an owl at night. Try not to have your call set too loud, you don't necessarily need to hear it from where you are ( it's a mistake a lot of people make). Trigger it when you are near it and judge if that's the right volume for the whatever call you are using, mouse, rat, rabbit, pheasant etc. Foxes have great hearing and can hear from great distances especially at night, but they can get spooked if the call is unrealistically too loud. Enjoy your new toy.