50Pcs T5577 Writable 125kHz RFID Key Fob Proximity ID Card Token Tag

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WRITABLE & REWRITABLE: It's rewritable chip, and it can write in 125khz id format and H ID WG 125khz format. Suitable for making new and back-up tags. FREQUENCY: 125kHz; Sensing Distance: 2.5 to 10 cm...