H.264 Compression Embedded Linux Network Time Protocol, Free DDNS Support Up to 3 TB Storage Capacity, USB/DVD-RW Backup Auto Image Size Control, Auto Email Notification Central Management S/W, Auto Audio Detection Direct Printing Support, Mouse controlled *Industrys 1st PDA Viewer with Real-Time Audio Capability* Channel & Frame Rate: 4Ch - 120 / 120 O/S: Embedded Linux - Built-in Flash Memory Video Input: 4 BNC Video Output: Monitor: 1 BNC, 1 VGA Audio Input: Line Input: 1 RCA Audio Output: Line Input: 1 RCA Compression Format: Video: H.264/ Audio: G.723 Recording Speed: Max. 120 (100) fps Recording Resolution: Max 704 x 480 (576) Recording Mode: Automatic, Continuous, Manual, Events (Sensor & Motion) Schedule Recording Storage: Internal: Max. 2 HDD, Max. 1.5TB Video Output Res.: LCD: SXGA (1280 x 1024), TV SDTV (720 x 480 / 576) Sensor Input: 4 Sensors Relay / TTL Output: 1ea NC / NO, 3ea TTL Out Backup & Copy Access: DVD-RW, USB 2.0 Memory Stick, Network Network Access: Various Network Interface (Ethernet 10/100, ADSL, Cable modem) PTZ Access: RS-485 Internal HDD / ODD: SATA HDD Max. 2ea / SATA Type DVD System Operation: Front Button, Mouse, IR Remote Controller, Keyboard Controller, Network System Upgrade: USB 2.0 Memory Stick, network Network: System Automation (Controlled by CMS), NTP Supported CMS, Monitoring by Web Browser / PDA / Mobile Viewer Others: 15 Languages Supported, Automatic E-mail;, Power: 12V /5A Max. Power Consumption: 40W / Operting Temperature: 41F ~ 104 F Weight without HDD: 8.8 lb / Dimension: 430 x 86 x 270mm