50Pcs UID 13.56MHz Writable IC Keyfobs, Cloneable S50 RFID Tags

1. The card is fully compatible with IC 1K cards. 2. Block 0 of the card (the block containing the UID) is rewritable and can be modified multiple times. 3. Block 0 can be modified directly using a standard IC card reader/writer; no special equipment is required. 4. The default password is FFFFFFFFFFFF. Specifications: Storage capacity: 8 Kbit, 16 sectors, two sets of passwords per sector Operating frequency: 13.56 MHz Data transfer rate: 106 kbps Reading distance: 2.5–10 cm Read/write time: 1–2 ms Operating temperature: -20°C to +85°C Endurance: >100,000 write/erase cycles Data retention: >10 years Compliance: ISO 14443, ISO 10536 Applications: Prepaid water meters, campus cards, transit stored-value cards, highway toll collection, parking systems, access control Color: Assorted Material: ABS Package Contents: 50 × UID rewritable cards Note: Color appearance may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3 cm.