Fyi Para, the closest Blood Electrification device to becks original is from SOTA, as he worked with the people at SOTA before his very tragic end.
I'm wearing the SOTA BE device as we speak, it does wonders from my Chronic Fatigue Syndrome. I used to have to sleep 12+ hours a day and now i only need a good 7 hours :).
So very much i recommend SOTA's BE device, I also have one of Parazappers UZI devices, I would say that it does its job but you have to really be a person who is not lazy to get full use from it as the prep work does take a lot longer then the SOTA BE device that you can just whack on your arm and go about your day. I will say though that parazapper creates a great product that works very well and is only limited in the fact that you cant move around while using it.