ARICEAN 125khz RFID Writable Rewritable T5577 Fob Tag (5 PCS)

["Original T5577 Chips,it doesn't have pre-programmed id number,so need to write the id on it before you read,Before use, you must first write data(card numbers) into them by a 125KHZ RFID card writer.","It's rewritable chip,and it can write in 125khz id format and H ID WG 125khz format","Can write by 125KHz RFID writer/copier,CAN NOT WORK WITH ONITY SYSTEM and Proxmark3 RDV4","Please note it can't be read before you program the chip","Writable & Rewritable. It can be erased and written 100,000 times. Suitable for making new and back-up tags, with the 125kHz RFID card writer/copier."]