Fangrui Product Details 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 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, Dont 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 It