1. Multi-function compatibility: supports 125 kHz frequency, compatible with EM4100, TK4100, T5577, and EM4305 chips 2. Multi-function device: combines copying, writing, duplicating, and programming functions for RFID tag processing 3. Portable design: compact and lightweight for easy operation and transport 4. User-friendly interface: intuitive and simple to use, no technical expertise required 5. Complete kit: includes a keychain for immediate use in RFID projects Name: RFID ID Writer Kit Product appearance and printed text may vary by batch, but functionality remains unaffected. Color: Random (color selection not available) Material: Plastic Package Contents: 1 × RFID ID Writer 5 × Keyfobs (colors and styles may vary) 5 × Cards This package includes only the items listed above. Note: Screen settings and lighting conditions may cause slight color differences between images and the actual product. Measurement tolerance: ±1–3 cm.