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'Multi-layer authentication for maximum security. 'Front panel options for OEM/ODM. 'Triplex operation with MJEPG/MPEG4 compression: high recording quality and fast network connection. 'Unified and intuitive OSD/operation across all models: shorten sales training and user learning. 'Multiple and flexible operation control: by mouse,IR controller and keypad operation. 'S/W upgradable via USB pen drive: enjoy latest features by simply download new S/W from USB pen drive. 'Optional SATA interf