125Khz clamshell card make of EM4001, it make of Non-Lead, Non-Toxic material. The whole production process confirms to ROHS standard, Plastic cover is made of which would not stimulate skin .It encode unique UID Code. Used in long read range requirement. It used for parking, access control, attendance. It is long read range and the function is very stable. For parking, access control. 125Khz Key card We supplier different key cards in various type and color, they are in high quality and reasonable price, need more information with the item , please contact me.