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Which is Better, CRP+relay or Dual CRP
 No idea,  you will have to tell us.  No, really, everyone is different and there is no way of telling which would suit you best.
The CRP+relay design
Research at Vanderbilt University shows that steep field gradients have more effect than stronger magnets in treating the body.   Steep field gradients, caused by stacking poles tightly together, mean that a small movement near the magnet gives a large change in field strength and this is important when interacting with the body.

Think of it as falling from a great height.   What affects you most is not the height, or the speed at which you approach the ground, but the rapid change in speed at the point of impact that has the effect on the body.
Same thing with magnets, it's not the strength of the magnet, or how fast blood or fluid flows past it, it's the rapid change of magnetic field that has the effect on body cells.  But it is a different effect.
Relay Magnet
So we use a bipolar magnet module design which is essentially a South pole surrounded by a North pole so that as blood cells flow past they see a rapid change in field strength and direction.
Now bipolar magnets do not have such a great depth of field as a conventional magnet, so we use a relay magnet on the opposite side of the wrist to pull the field further into the wrist as shown on the right.  This
is the CRP+relay design.

Wrist
Wrist ArteriesThe Dual CRP module design
When you look at the human wrist, the veins and arteries do not flow in straight lines and there are pulse points on both sides of the wrist.   So the Dual CRP wristbands were developed to fit over these pulse points to give the maximum effect.

So that's why there are two types of wristband in our range, the CRP+relay works best with some people while others find the dual CRP wristband works best.   It all seems to depend on the positioning of the veins and arteries in the wrist.   And we are all slightly different.

We cannot advise you which style will suit you best, all we can say is try one, if it doesn't work as well as you hoped, try the other.

With our money back guarantee you cannot lose.

Our CRP+relay wristbands are the Adventure, the Explorer 2, the Executive, the Finesse and the Elite.
Our Dual CRP wristbands are the Duo, the Duet, the Monet, and the Pirouette


PS
Remember I said above that steep field gradients were more effective that stronger magnets in  having an effect on the body cells?   Well we did both.   As well as using a steep field gradient design, we use the strongest magnets available.