That is because a friend recommended me to buy this to a RFID tracking system it, but now it seems that this is a RFID tracking system I now buy is simply too powerful, we use a lot of products but never used such good quality products, but also did not expect this one effect will be so good, I since we company began to use this to a RFID tracking system the efficiency of our work with higher than before many times, I believe that as long as the use of RFID tracking system people and I have the same idea, no way who let this a RFID tracking function of system is so powerful, so people have used this kind of love.