M210 wireless access control Features: Wireless/low power battery operationSupport mobile phone APP bluetooth one-key open door, remote door open, near field automatic door openSupport encryption card authorization, simple and convenientOptional 2G/NBIoT/4G/WiFiOptional support for Weigand output, perfectly compatible with traditional access controlPassword to open the door, visitor temporary password to open the door, remote door openCan be mounted on metal surface ,various housings are available