... be open by card or key.Integrate 5 functions into it: motor electronic lock, EM/Mifare card reader, access control, and ... control system, standalone or network operation, RS422 telecommunication.Stainless lock, easy installation; with LED light and beeper indicating working ... ( DC12V )Operating Temperature-10~55Operating Humidity0% ~95%RH electronic lock which can be open by card or key - CHD2100