... RS232,RS485 interface 8pcs SATA hard disks 8-CH Network Video Record For IP Camera ModelYW908NDVideo compressionH.264Video ... lost, Motion detection, Video shield, HDD error, Unauthorized user access detection, No HDD notification, HDD lost alarmAlarm LinkageBuzzer, Snapshot ... internet, or local upgrading through USBSecurityMulti-level user access with password protectionMax. User2 real-time user for ...