I bought the scales and over the last week they showed a gain of 5%, even though I measured at the same time everyday, under the same hydration conditions. My weight has not budged a bit. I don't belive them at all. They aren't even showing up changes - I have done 2 DNP cycles in the last 3-4 weeks and lost 8 lbs. Now the scales show I have gained 1 %, even though my weight has gone down. Everyone knows that DNP is incredibly muscle sparing so I MUST have lost around 4% bf.
I give up with them. I might try and sell them. They aren't supposed to work for bodybuilders anyway, even on the athlete mode.