... RJ45,RS232,RS485 interface 8pcs SATA hard disks 8-CH Network Video Record For IP Camera ModelYW908NDVideo ... Audio output bite rate8KHz/64KbpsAlarmAlarm TypeExternal sensor, Video lost, Motion detection, Video shield, HDD error, Unauthorized user access ... HDD notification, HDD lost alarmAlarm LinkageBuzzer, Snapshot and video recording, email notification, External Alarm outputAlarm input16 channels ...