useless product does not work and the reflective surface (black) reading is around 950+ which is close to the white surface of 1000+, seller sent me 10 pieces and is not.even offering me any refund
look at this image and decide.for yourself , it's reading in 1st two lines has no range, which means you can't decide on coding the 0 and 1 digital bits, the seller is not even accepting their mistake and refunding me
Not yet tested.