• -Material: High-quality PVC
• -Size: Clamshell Thick Card
• -Chip family: EM4100 ID
• -Frequency: 125KHZ
• --Read range: 2cm ~ 90cm (depends on the ID card reader)
• -With 18 digits ID number printed on it.
• -It is NOT a writable card, just READ ONLY to be used in your system directly
• -All cards have a unique ID number.