This is EM4100/4102 ,is Read-only, not programable,not HID!!!!

• 100% brand new and high quality
• Frequency: 125 KHz
• Card type: EM 4100/4102 125Khz ID CARD
• Size: 85mm x 54mm x0.6mm
• Material: PVC
• Each card pre-programmed with a unique ID number, which is printed on the card
• ID card is suitable for 125KHZ card reader and reading distance is 0 - 10cm