VICON SECURITY KEY FOB SMARTCARD VAX-DK4-3 by Vicon Security SKU VAX-DK4-3 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to List KEY FOB SMARTCARD; small tag designed to be carried on a key ring; MIFARE DESFire EV2 compliant; 4 K-byte memory