Hi, I want to introduce tacho, i read the instruction on the taho web. I wonder when i download evrythin and conect device on taho web and istal smart card reader.Then i use one PC and one reader for tacho cards that must be constantly connected, i don undestend only this part- If i have 100 vehicles and 100 tacho cards then do i nead 100 tacho card reader wher i put tacho card. ..Do i need 100 connected card reader with pc or how does it work if someone can clarify me. Pleas it is emergency.Thank you very much.