10 PCS Red 125kHz T5577 RFID Key Fob, Rewritable Proximity ID Token Key Chain Tag, Contactless Smart Access Control Keyfob for Door Security System

Additional Details from the Manufacturer

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More features

• Chip: ATMEL T5577 (compatible with other universal 125kHz tags)
• Note: You cannot add them to RFID locks directly. You must write data into them by a 125kHz RFID card writer before use. They are blank tags, no data inside. Frequency: 125kHz; Sensing Distance: 2.5 to 10 cm (1 to 4 inch); Data Storage Life: 10 Years.
• 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.
• Purpose: Can be used for various access control systems, etc