... Card type:EM4100,EM4102,TK4100,TK28 Output mode:Serial/Keyboard/USB port ID Serial Port RFID Reader The reader can read ID ... computer by RS232 interface.Using management software to record ID serial No,you can find more function.It has reliable performance ... EM4102,TK4100,TK28 or other compatible cards Working frequency:125KHz Communication protocol:RS232,keyboard,USB Reading distance:2-8cm Reading time ...