... / sensor triggered Display Mode Single / Quad / Nine / Hex HDD Interface Support 2pcs Sata HDD (support up to 1TB for each) Network Interface RJ45 ... , support PELCO-P & PELCO-D Backup USB Flash Disk, Removable HDD, Network Alarm Mode Motion Detection, Sensor triggered, video loss ... ,HDD error, password error Senor & Alarm I/O 16 sensor inputs / ...