1. Multi-function compatibility: supports 125KHz frequency, compatible with EM4100, TK4100, T5577 and EM4305 chips 2. Multi-function device: combines the functions of copier, writer, duplicator and programmer, making it a comprehensive tool for RFID tag processing 3. Portable design: this device is small and portable, easy to operate and carry, and is an ideal choice 4. User-friendly interface: the interface is simple and easy to use, no technical knowledge is required, suitable for professionals and amateurs 5. Complete kit: equipped with a keychain, you can start various RFID projects immediately Name:RFID ID Writer Kit (The product appearance and printed words depending on the batch, but this does not affect use) Material: plastic Color: random colors (random colors, don't accept the specified color) Package Contents: 1 * RFID ID Writer 5 * Keyfobs(Color, style random) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.