Originál T5577 Chip, it doesn't have pre-programmed id number, tak need to write the id on it before you read it's rewritable chip, and it can write in 125 kHz id format and H ID WG 125 kHz formát Please note it can't be read before you program the chip can write by 125KHz RFID writer/copier modrá, černá, žlutá, červená barva k dispozici v tyčince