I got one of those from that blueparrot guy for the 2985. It has the two channel changer buttons on top and a 6 hole plug on the end. It's very heavy, but nice, however, one of the buttons only works when it wants to and you know when you leave the vent open in your car at night and the local tom cat climbs up there and pisses in it. That's what the foam inside the mouthpiece smelled like. It's enough to gag a maggot. And worse, doesn't matter if you use an amp or not, it drops about 30% of the power output. Unless your driving a convertable semi, forget this piece of crap.