Description Support reading, writing and reprogramming, over 100,000 rewriting times. Can clone 13.56MHz IC cards, NFC stickers, NOT compatible with 125kHz key cards. Fully compatible with MI- Classic 1K, 4- UID, 1024 bytes of memory, organized into 16 sectors with 4 blocks, compatible with /IEC 14443A protocol. Compatible with all types of 13.56MHz RFID readers and door access control systems. Waterproof. Each card comes with a key ring. Each card has a unique encrypted ID number, card data can be reprogrammed. Color: Blue Material: ABS Package Contents: 100 x Cards The above package content only, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.