RFID 13.56 Mhz 6cm blue Tags

🏷️ RFID 13.56 MHz Blue Keyfob Tags

Blue ABS keyfob tags for 13.56 MHz contactless systems — the round keychain style used with door access, time clocks and hobby readers such as the RC522. Each tag has a pre-drilled hole and a split ring, so it goes straight onto a keyring.

✨ Key Features

• 13.56 MHz high-frequency (HF) contactless tags
• Hard ABS shell, water resistant and pocket friendly
• Pre-drilled hole with metal split ring included
• Readable UID plus rewritable data blocks (Mifare compatible)
• Small fob, roughly 6 cm including the ring
• Works with common HF readers — RC522, PN532, MFRC522

🔬 Specifications

• Frequency: 13.56 MHz
• Chip: Mifare-class 1K, ISO14443A compatible
• Memory: 1 KB across 16 sectors
• Read range: approx. 0–5 cm depending on reader
• Housing: blue ABS plastic
• Size: approx. 40 mm body, 6 cm with ring
• Attachment: pre-drilled hole and split ring

💡 Perfect For

• MFRC522 / RC522 Arduino access-control projects
• ESP32 or Raspberry Pi attendance and door-lock builds
• Escape-room props and hotel-style keycard demos
• Labelling drawers or tool bins that are read by a scanner

📦 Notes

These are 13.56 MHz HF tags and will not read on 125 kHz low-frequency (EM4100-type) readers. Reading the UID needs no keys; writing blocks requires the correct sector keys.