1. H.264 Standalone DVR 2. Support SATA HardDisk,Mouse,USB*2,network 3. Audio, RS485, IE browse,15 languages 4.HDD,alarm H.264 main ... profile compression algorithm ideal for standalone DVR4 channels Realtime full D1 recording or 2 channels real time full D1 + 6 channels real time ... (width) * 330MM (length) * 58MM (highly)Weight2.38KG 4CH Full D1 Real Time H.264 CCTV DVR