Wilson Sleek, works very good for us. If you get one, throw out the stubby antenna that came with it, call Wilson, and upgrade to the model of better antenna they recommend for your model of Sleek. They'll give you the model #, and you can usually buy it cheaper on Amazon than direct from Wilson.
When we set up camping, I have a painter's extendable pole with a 4" dia pc of sheet metal at the top (magnet antenna supposed to be attached to same per instructions) stuck 4' in the air above our RV. The pole fits nicely in a flagpole holder attached to the RV rear bumper.
