Handheld shape design, comfortable hand feeling and high quality.2 buttons for simple operations.Standalone operation, no need to connect with computer / PC, easy to use.Built-in individual LED lights and buzzer indicator.Reading distance is 0 – 6cm.Can only copy 125KHz RFID card, Compatible with T5577, CET5200, EM4305 and EN4305.ParameterRead: EM / TK (EM4100 TK4100 etc) cards or keysWrite: EM4305 CET5557 T5577 5200 EM4205 etc cards or Keys (not support HID chip or ther not supportable type chip)Built-in: individual LED lights and buzzer indicator, transceiver antennaPower Supply: 3V (2 x AAA battery)Times: Read / Write – 20000 timesSize: ( L*W*H ): 115 x 70 x 30mmWeight: 85g