I have no idea which one I received because it's not listed on their website...so I believe the previous 1-star review that they get cheap jammers to sell from other sites/manufacturers. There were no instructions or a description included in package. It worked well for 2 weeks and then stopped being reliable. My phone wasn't even blocked when I had it in the same room as the jammer. I believe within a week it will completely stop working. Do I think I'm going to get my money back? Of course, not.
Unfortunately, cheap garbage and unreliable products made in China.