General description The 300Pcs UID 13.56MHz Block 0 Sector Writable Smart Card Clone Changeable Smart Keyfobs are versatile RFID access control cards that are fully compatible with 1k IC cards. These cards allow for the modification of Block 0, where the UID is located, enabling repeated changes without the need for special equipment. 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 Other information Default password: 12 F (FFFFFFFFFFFF) Material: ABS Color: Mixed color Package contents: 300 x UID Copy Card Note: Light reflection and different displays may cause the color of the item to differ slightly from the real thing. Measurement allowed error: +/- 1-3 cm