A micro-sized NFC/RFID transponder built around the NXP NTAG203 chip operating at 13.56 MHz. Its tiny, flexible form factor makes it ideal for embedding into rings, wearables, keychains, and other compact devices where full-sized NFC tags won't fit.

The tag provides 144 bytes of read-write memory and is compatible with PN532-based readers as well as NFC-enabled smartphones and tablets. Due to the small antenna, the tag must be placed very close to the reader for reliable communication.

Key Features

• NTAG203 Chip – 13.56 MHz NFC/RFID transponder
• 144 Bytes Memory – Read-write accessible storage
• Micro Form Factor – Extremely small and flexible
• Passive – No battery required; powered by the reader's field
• Wide Compatibility – Works with PN532 readers, NFC-enabled phones, and tablets

Specifications

• Chip: NXP NTAG203
• Frequency: 13.56 MHz
• Memory: 144 bytes (read-write)
• Protocol: ISO 14443A

Ideal For

• DIY NFC rings and wearables
• Embedding in small objects and enclosures
• Smartphone automation triggers (URLs, commands, device unlock)
• Access control and identification projects

Package Contents

• 1× Micro NFC/RFID Transponder (NTAG203)