1. Multi-function compatibility: supports 125KHz frequency, compatible with EM4100, TK4100, T5577 and EM4305 chips2. Multi-function device: combines the functions of copier, writer, duplicator and programmer, making it a comprehensive tool for RFID tag processing3. Portable design: this device is small and portable, easy to operate and carry, and is an ideal choice4. User-friendly interface: the interface is simple and easy to use, no technical knowledge is required, suitable for professionals and amateurs5. Complete kit: equipped with a keychain, you can start various RFID projects immediatelyName:RFID ID Writer Kit(The product appearance and printed words depending on the batch, but this does not affect use)Material: plasticColor: random colors (random colors, don't accept the specified color)Package Contents:1 * RFID ID Writer5 * 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.