H.264 compression Embedded LINUX operating Systems Real-time live display up to 4 camerasSupport Dual streams 5-IN-1, Support HDAVI(AHD), HDTVI, HDCVI, CVBS & IP Camera InputSupport Mobile Monitoring Digital Zoom in Live & PlaybackHD video output at 19201080 resolution Supports multiple web browsers Unique Triple watchdog functionTwo way audio