... ,000 Communication:RS232, RS485, TCP /IP Time Clock with Proximity Reader M880 Introduction: M880 is a multimedia ... , bell, lock, exit, switch, etcBuilt-in USB port allows for manual data transfer when network isn't ... Capacity50,000Transaction Storage150,000Hardware PlatformZEM510Operating SystemLinuxCommunicationsRS232485, TCP/IP, USB-HostCard SupportID Card(Standard), Optional HID/Mifare/ iClass ...