Original T5577 Chip,it doesn't have pre-programmed id number,so need to write the id on it before you read
it's rewritable chip,and it can write in 125khz id format and H ID WG 125khz format
Please note it can't be read before you program the chip
can write by 125KHz RFID writer/copier
Description
1. Material:Genuine Leather
2. Frequency: 125 KHz
3. chip: Original AT MEL T5577 (The best rewritable chip)
4. Package included: 2pcs T5577 leather keyfob
5. Working Mode: Read-write modes - Can be used in 125KHz RFID card Copier/ Duplicator
6. Storage Capacity: 330 bit (264 free bit availability)
7. Reading distance is 0 - 10cm