Overview: This system have one built-in reader This system supports 1000 EM cards Can work with a WG26 card reader, open the door indoor & outdoor with the card, increase the system security This system supports multi-mode entry methods (" Card only", Card amp; Password & " Card or Password") Relay output (E-lock), one set of Doorbell Distance: 5-20cm Card Type: RFID card/token Specification: Weight Approx:194g Size Approx:10 x 13 x 3