General description The 400Pcs UID 13.56MHz Block 0 Sector Writable Smart Card Clone Changeable Smart Keyfobs 1K S50 RFID Access Control are versatile smart cards designed for various applications such as prepaid meters, campus cards, bus stored-value cards, toll highways, parking, and community management. These cards are fully compatible with 1k IC cards and allow for easy modification of the UID. Technical specifications Storage capacity: 8Kbit Partitions: 16 Passwords: Two sets for each partition Working frequency: 13.56MHz Communication speed: 106Kboud Reading distance: 2.5-10CM Reading and writing time: 1-2MS Working temperature: -20℃ to 85℃ Erasing and writing times: More than 100,000 times Data retention: More than 10 years Production number: 14443, 10536 Compatibility and accessories Compatible with 1k IC cards Can be modified with an ordinary IC reader and writer Usage Ideal for cloning and changing UID for access control systems Suitable for various applications including