200sets usb interface proximity 125khz rfid reader tk4100 passive rfid id reader smart card reader for computer

communication interface: mini usb interface operating voltage: 5v operating current: 100ma weight: 50g working temperature: -10 °c ~ 60 °c humidity: 5% ~ 95% status indicator: dual led ( "blue" --- power indicator, "green" --- status indicator) application: attendance member management etc. employee identification