This product is a 125KHz RFID card making handheld machine, which can easily save the ID card number of 125KHz. Therefore, you may receive the same pair of ID cards for other purposes such as access control identification, attendance control , etc . Features: Independent operation, without the need to connect to a computer or PC . Built - in transceiver antenna, high sensitivity and fast read and write speed . Manual shape , 2 buttons for easy operation, convenient to use. Built - in individual LEDs and buzzer indicator indicating the operation procedure. Support for writing system: T5577 or EM4305 or 5200 or 8265 or 8268 or 8800. Reading system support: TK4100 or EM4100 or EM4200 or TK4100-D. . . PROGRAMMER READER COPIER RFID SET 125KHZ Technical date: Battery powered: 3V (2 x AAA battery) (batteries not included) Temperature: -20-50℃ Lifespan: 15000 times Reading distance: 0 - 6 cm Size: 11.5cmx7cmx3cm or 4.5x2.8x1.2inch Package Weight: 106g or oz . PROGRAMMER READER COPIER RFID SET 125KHZ List of packages: 1 x RFID manual copier (batteries not included) 5xWritable RFID Keychains 1 x User Manual Note: Please note that this type of chip card leaves the factory as an empty card and must be saved before it can be read. . PROGRAMMER READER COPIER RFID SET 125KHZ