RFID Reader, this RFID reader is just a slave reader and it cannot work alone which means it needs to connect with access controller;   to work with access controller, make sure the controller has WG26 or WG34 input as D1 D0; not working with other inputs > Mini size body > Waterproof, conforms to IP66 > Wiegand 26/34 bits output (default: 26bits); this reader ID EM has WG26 and WG34; IC reader only WG26, no WG34; > Card type: 125KHz EM card > Working temperature: -40 oC ~ 60 oC (-40 oF ~ 140 oF) > Reading range: 3~8 cm Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.