Piece if Junk!
Tried product right out of the box.  Applied over 4 lbs. of weight before it moved off of zero.  Removed the weight and the scale returned to a negative read out rather than zero.  Reset to zero and tested again.  Same results.  Performed test three times, same results every time.  Went back in the box and returned.  Don't waste your time or money.
Rating: 1 stars