Mauser the summit system is great.I wish more folks would use one of the two.I was hunting a releatives property a few back, and heard a helicopter aproaching from the distance(it was a remote area too)anyway come to find out a guy hunting the adjacent property fell out of his tree and broke his back.That hunter also sued the farmer which I think is a crock[:@].I like to let those that let me hunt know that I use this system,and take a cell phone with too.It really does add to the safety and comfort of the hunt.