50pcs EM4100 Contactless 125kHz RFID Proximity ID Entry Access Card

• Product Name : RFID Cards;Material : Plastic
• Colour: White; Detection distance: 2 x 15 cm
• Chip: 4100 operation; Frequency: 125 kHz
• Size: 85.5 x 54 x 0 mm/8 x 3.37 2.12 x 0.03 inches (L x W x T); Weight: 315 g.
• Package contents: 50% (2 x RFID card pieces).

Pre-programmed with unique, 10-digit, identification number in a box (this RFID card is only read and not rewritable).